Č. Radović, M. Gogić, D. Radojković, V. Zivkovic, N. Stojiljković, N. Parunović, R. Savić
The aim of this study was to determine the influence of the applied method of the quality carcass in 201 descendants, both sexes (n=108 male castrated animals and n=93 females), of studied boar-sires. For the determination of the meat yield (JUS1) and the share of meat (JUS 2) in carcass sides, on the basis of the performed measurements, tables for meat pigs, which are an integral part of the Rulebook on the quality of slaughtered pigs and categorization of pork meat (OG SFRY, 1985), were used. Share of meat (EC 94 and EC 06) was determined on cooled left carcass sides by method of partial dissection (according to methodology recommended by EU- Walstra and Merkus, 1996). Research was carried out on pig farm and in experimental slaughterhouse of the Institute for Animal Husbandry, Belgrade-Zemun. Housing, care and nutrition of animals were in accordance to breeding technology in investigated herd. The average share of meat determined by the application of the Rulebook (JUS2) was 43.58% with a lower absolute variation compared to the EU regulation from 1994 (EC 94; 53.56%) and from 2006 (EC 06; 56.55%). The estimated lean meat content by the application of the Rulebook (JUS 2) was by 9.98% lower compared to the EC 94 regulation and by 12.97% lower compared to EC 06. If we are talking about the selection of offspring for breeding, if we consider only the estimated leanness, we see that within the Landrace (L) breed we have high and very significant (P<0.001) differences between the sires for the assessed meat content according to EC 94 and EC 06. By implementing new methods of assessment of lean meat content (EC 94 and EC 06), a higher share of meat (9.98% respectively 12.97%) was determined compared to the Rulebook (1985). This research indicates the necessity of changing the current method for the establishment of meat content of pigs in the Republic of Serbia.
{"title":"The influence of boar breed and applied method on the meat content","authors":"Č. Radović, M. Gogić, D. Radojković, V. Zivkovic, N. Stojiljković, N. Parunović, R. Savić","doi":"10.2298/bah2001017r","DOIUrl":"https://doi.org/10.2298/bah2001017r","url":null,"abstract":"The aim of this study was to determine the influence of the applied method of\u0000 the quality carcass in 201 descendants, both sexes (n=108 male castrated\u0000 animals and n=93 females), of studied boar-sires. For the determination of\u0000 the meat yield (JUS1) and the share of meat (JUS 2) in carcass sides, on the\u0000 basis of the performed measurements, tables for meat pigs, which are an\u0000 integral part of the Rulebook on the quality of slaughtered pigs and\u0000 categorization of pork meat (OG SFRY, 1985), were used. Share of meat (EC 94\u0000 and EC 06) was determined on cooled left carcass sides by method of partial\u0000 dissection (according to methodology recommended by EU- Walstra and Merkus,\u0000 1996). Research was carried out on pig farm and in experimental\u0000 slaughterhouse of the Institute for Animal Husbandry, Belgrade-Zemun.\u0000 Housing, care and nutrition of animals were in accordance to breeding\u0000 technology in investigated herd. The average share of meat determined by the\u0000 application of the Rulebook (JUS2) was 43.58% with a lower absolute\u0000 variation compared to the EU regulation from 1994 (EC 94; 53.56%) and from\u0000 2006 (EC 06; 56.55%). The estimated lean meat content by the application of\u0000 the Rulebook (JUS 2) was by 9.98% lower compared to the EC 94 regulation and\u0000 by 12.97% lower compared to EC 06. If we are talking about the selection of\u0000 offspring for breeding, if we consider only the estimated leanness, we see\u0000 that within the Landrace (L) breed we have high and very significant\u0000 (P<0.001) differences between the sires for the assessed meat content\u0000 according to EC 94 and EC 06. By implementing new methods of assessment of\u0000 lean meat content (EC 94 and EC 06), a higher share of meat (9.98%\u0000 respectively 12.97%) was determined compared to the Rulebook (1985). This\u0000 research indicates the necessity of changing the current method for the\u0000 establishment of meat content of pigs in the Republic of Serbia.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121634811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Violeta Mandić, Z. Bijelić, V. Krnjaja, M. Petričević, A. Simić, Ivan Krga
Vojvodina Province is a major alfalfa producer in Serbia with approximately 35.7% of total area and total production share of approximately 43.1%. In this paper, the data on area, production and yield of alfalfa observations from 1947 to 2018 and their variation and trends are analysed. The data indicate wide differences in the harvested area, total production and yield of alfalfa. The analysis of data indicates that harvested area and total production of alfalfa have declined over the past decades. Yield trend shows strong yield increase during 1950-1980 followed by periods of declined growth rates to 1990. After 1990s, dry matter yield has been stagnant. However, the increase, decrease and stagnation in yield are not strictly linear.
{"title":"Trend analysis of harvested area, total production and yield of alfalfa in Vojvodina","authors":"Violeta Mandić, Z. Bijelić, V. Krnjaja, M. Petričević, A. Simić, Ivan Krga","doi":"10.2298/bah1904409m","DOIUrl":"https://doi.org/10.2298/bah1904409m","url":null,"abstract":"Vojvodina Province is a major alfalfa producer in Serbia with approximately\u0000 35.7% of total area and total production share of approximately 43.1%. In\u0000 this paper, the data on area, production and yield of alfalfa observations\u0000 from 1947 to 2018 and their variation and trends are analysed. The data\u0000 indicate wide differences in the harvested area, total production and yield\u0000 of alfalfa. The analysis of data indicates that harvested area and total\u0000 production of alfalfa have declined over the past decades. Yield trend shows\u0000 strong yield increase during 1950-1980 followed by periods of declined\u0000 growth rates to 1990. After 1990s, dry matter yield has been stagnant.\u0000 However, the increase, decrease and stagnation in yield are not strictly\u0000 linear.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115196087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Petričević, D. Nikšić, N. Delić, T. Stamenic, V. Petričević, L. Samolovac, Violeta Mandić
The aim of the experiment was to investigate the effect of adding flax seed to the cattle diet in the final stage of fattening. A total of 30 male Simmental cattle of uniform initial weight were selected for the trial, which were divided into 2 groups (KON (control) and LS (experimental)). Animals in the control group did not consume flax seed as a dietary supplement, and animals in the experimental group consumed flax seeds in the amount of 3.75% of the concentrated portion of the meal in the last 90 days of fattening, i.e 300 g per day. After slaughtering and cooling, the left carcass side was cut into basic parts according to the Regulation. The study included examination of the tissue fraction of parts of the carcass of the young, determined by dissection. The results of the study showed that the addition of flax seed in the diet had no statistically significant effect on the composition of the carcass parts of the young bulls at the end of the experiment.
本试验旨在探讨在育肥后期在牛饲粮中添加亚麻籽的效果。试验选用初始体重均匀的西门塔尔公牛30头，分为对照组(KON)和试验组(LS)。对照组不添加亚麻籽，试验组在育肥期最后90天按饲粮浓缩部分的3.75%，即300 g / d添加亚麻籽。在屠宰和冷却后，将左侧胴体按规定切割成基本部分。这项研究包括检查幼鱼胴体部分的组织部分，通过解剖确定。研究结果表明，日粮中添加亚麻籽对试验结束时犊牛胴体部位组成无显著影响。
{"title":"The study of the share of tissues in bovine carcass parts under the influence of the flaxseed diet","authors":"M. Petričević, D. Nikšić, N. Delić, T. Stamenic, V. Petričević, L. Samolovac, Violeta Mandić","doi":"10.2298/bah2002155p","DOIUrl":"https://doi.org/10.2298/bah2002155p","url":null,"abstract":"The aim of the experiment was to investigate the effect of adding flax seed\u0000 to the cattle diet in the final stage of fattening. A total of 30 male\u0000 Simmental cattle of uniform initial weight were selected for the trial,\u0000 which were divided into 2 groups (KON (control) and LS (experimental)).\u0000 Animals in the control group did not consume flax seed as a dietary\u0000 supplement, and animals in the experimental group consumed flax seeds in the\u0000 amount of 3.75% of the concentrated portion of the meal in the last 90 days\u0000 of fattening, i.e 300 g per day. After slaughtering and cooling, the left\u0000 carcass side was cut into basic parts according to the Regulation. The study\u0000 included examination of the tissue fraction of parts of the carcass of the\u0000 young, determined by dissection. The results of the study showed that the\u0000 addition of flax seed in the diet had no statistically significant effect on\u0000 the composition of the carcass parts of the young bulls at the end of the\u0000 experiment.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114403331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Caro-Petrovic, M. Petrović, D. Ružić-Muslić, Nevena Maksimović, I. Sycheva, Bogdan Cekić, I. Ćosić
Records of female lambs and their parents of the Mis sheep breed have used. All animals are approximately have weaned at 90 days of age. Descriptive statistics, paired sample test, paired differences, measures of association, correlations and regression of body weights between female lambs and their parents have done. A complementary least body weights at 30 days and weaning between dams and lambs but utmost weight at 30 days, the lambs were higher while at weaning, the dams had higher weight. It can observe that the averages on body weights the rams were the highest, followed by lambs and the lowest the dams? body weights. The coefficient of determination of R2 varies from low to high, indicating that the lamb's body weight has more influenced by other factors that we have not considered. There were significant correlations between lamb body weight at birth and sire/dam body weight at birth. The results showed highly significant correlations of lamb's body weight at 30 days with dams but with sires, positive and very low. There had positive but no significant correlation between lamb body weight at weaning and sire body weight at weaning. Lamb body weight at weaning and dam body weight at weaning are highly correlated.
{"title":"Interrelation between body weights of sire, dam and their lambs at early stage of growth","authors":"V. Caro-Petrovic, M. Petrović, D. Ružić-Muslić, Nevena Maksimović, I. Sycheva, Bogdan Cekić, I. Ćosić","doi":"10.2298/bah2002205c","DOIUrl":"https://doi.org/10.2298/bah2002205c","url":null,"abstract":"Records of female lambs and their parents of the Mis sheep breed have used.\u0000 All animals are approximately have weaned at 90 days of age. Descriptive\u0000 statistics, paired sample test, paired differences, measures of association,\u0000 correlations and regression of body weights between female lambs and their\u0000 parents have done. A complementary least body weights at 30 days and weaning\u0000 between dams and lambs but utmost weight at 30 days, the lambs were higher\u0000 while at weaning, the dams had higher weight. It can observe that the\u0000 averages on body weights the rams were the highest, followed by lambs and\u0000 the lowest the dams? body weights. The coefficient of determination of R2\u0000 varies from low to high, indicating that the lamb's body weight has more\u0000 influenced by other factors that we have not considered. There were\u0000 significant correlations between lamb body weight at birth and sire/dam body\u0000 weight at birth. The results showed highly significant correlations of\u0000 lamb's body weight at 30 days with dams but with sires, positive and very\u0000 low. There had positive but no significant correlation between lamb body\u0000 weight at weaning and sire body weight at weaning. Lamb body weight at\u0000 weaning and dam body weight at weaning are highly correlated.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116739238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The aim of this study was to determine the effect of prebiotics in the diet of piglets after weaning on the increase in the average weight of experimental animals between female (?) and male (?) piglets, dynamically by weeks of experiment, as well as on the presence of Escherichia coli in faeces. The experiment included piglets at weaning, aged about 26 days. The F1 generation was used, which was created by crossing Landrace sows and Pietren boars. The piglets were fed for 56 days (8 weeks). Four groups were formed, each group was composed of 10 piglets (5 females and 5 males) with different concentrations of prebiotics and controls, in two replicates, a total of 100 experimental animals. Feed mixtures consisting of the same nutrients were used in the diet. Control groups (OA and OB) were fed with ordinary feed mixture, without the addition of additives, groups (IA and IB) with the addition of Bio-Mos prebiotics, in a concentration of 0.1%, groups (II-A and II- B) with 0.2%, groups (III-A and III-B) with 0.3% and groups (IV-A and IV-B) were fed with the addition of prebiotics in a concentration of 0.4%. It was concluded that the differences observed in the average weight between ? and ? piglets in any measurement period were not statistically significant. However, the best results in terms of average weight were given by the highest used concentrations of prebiotics in food, 0.4% and 0.3%. The preparation had a positive effect in terms of reducing the number of Escherichia coli bacteria in the digestive tract of piglets in all treatment groups by 42 to 320 times.
{"title":"Influence of prebiotics in pigs nutrition on body weight and content of Escherichia coli in feces","authors":"Mirjana Delić-Jović","doi":"10.2298/bah2103183d","DOIUrl":"https://doi.org/10.2298/bah2103183d","url":null,"abstract":"The aim of this study was to determine the effect of prebiotics in the diet\u0000 of piglets after weaning on the increase in the average weight of\u0000 experimental animals between female (?) and male (?) piglets, dynamically by\u0000 weeks of experiment, as well as on the presence of Escherichia coli in\u0000 faeces. The experiment included piglets at weaning, aged about 26 days. The\u0000 F1 generation was used, which was created by crossing Landrace sows and\u0000 Pietren boars. The piglets were fed for 56 days (8 weeks). Four groups were\u0000 formed, each group was composed of 10 piglets (5 females and 5 males) with\u0000 different concentrations of prebiotics and controls, in two replicates, a\u0000 total of 100 experimental animals. Feed mixtures consisting of the same\u0000 nutrients were used in the diet. Control groups (OA and OB) were fed with\u0000 ordinary feed mixture, without the addition of additives, groups (IA and IB)\u0000 with the addition of Bio-Mos prebiotics, in a concentration of 0.1%, groups\u0000 (II-A and II- B) with 0.2%, groups (III-A and III-B) with 0.3% and groups\u0000 (IV-A and IV-B) were fed with the addition of prebiotics in a concentration\u0000 of 0.4%. It was concluded that the differences observed in the average\u0000 weight between ? and ? piglets in any measurement period were not\u0000 statistically significant. However, the best results in terms of average\u0000 weight were given by the highest used concentrations of prebiotics in food,\u0000 0.4% and 0.3%. The preparation had a positive effect in terms of reducing\u0000 the number of Escherichia coli bacteria in the digestive tract of piglets in\u0000 all treatment groups by 42 to 320 times.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124821063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alpaca domestication took place more than 6000 years ago. The Indians of Peru discerned the potential in these animals, tamed them and began to breed. In the past, alpacas were called the ?Inca gold?: they could provide people with all the necessary resources for living. People dressed in skins, ate meat, spun wool and made clothes, and used manure as fuel. An increase in the number of livestock on the Russian Alpaca and Capri farms favorably affects the further distribution of alpaca as a species in Russia. The possibility of recognition of alpaca as an agricultural animal will be the sale of wool, its processing, as well as the rejection of imported raw materials.
{"title":"Biological features and productivity of Alpaca","authors":"I. A. Ponomareva, N. Sycheva","doi":"10.2298/bah1904417p","DOIUrl":"https://doi.org/10.2298/bah1904417p","url":null,"abstract":"Alpaca domestication took place more than 6000 years ago. The Indians of Peru\u0000 discerned the potential in these animals, tamed them and began to breed. In\u0000 the past, alpacas were called the ?Inca gold?: they could provide people\u0000 with all the necessary resources for living. People dressed in skins, ate\u0000 meat, spun wool and made clothes, and used manure as fuel. An increase in\u0000 the number of livestock on the Russian Alpaca and Capri farms favorably\u0000 affects the further distribution of alpaca as a species in Russia. The\u0000 possibility of recognition of alpaca as an agricultural animal will be the\u0000 sale of wool, its processing, as well as the rejection of imported raw\u0000 materials.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"591 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123142553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Mouhous, F. Djellal, H. Guermah, Siamwalla Ammar
The aim of this study is to explore the technical and economic aspects of cattle farms in mountain areas and to identify their technical constraints and potentialities. One hundred dairy cattle farmers were surveyed for seven months. The results show that the average farm size is 13 dairy cows and shows considerable variability at the sample level. For one-third of the farms, stabling is almost permanent and feed concentrate used as supplement (on average 7 kg /cow/day). 85% of the factors of production (useful agricultural area and possession of tractor) are owned by 45% of the breeders. Cow productivity averages is around 10.5 kg / day with two milkings / day. In addition, the average self-consumption of milk is 6 kg / day, which represents 2.8% of milk production. Feed expenses represent 90% of production costs. Annual income range from 99 909 AD / livestock unit (LU) nearly 148 421 AD / livestock unit. This variation is a function of the endowment of production resources. Subsidies for milk production represent 58% of the average income of farmers, what shows the low yield of dairy cattle farms. Today, with the drastic reduction in financial resources, dairy production development policies should focus on strategies to improve cow productivity and profitability in those areas.
本研究的目的是探索山区养牛场的技术和经济方面，并确定其技术限制和潜力。对100名奶牛养殖户进行了为期7个月的调查。结果表明，平均农场规模为13头奶牛，在样本水平上表现出相当大的变异性。在三分之一的农场中，猪圈几乎是永久性的，饲料精料作为补充(平均7公斤/头牛/天)。85%的生产要素(耕地面积和拖拉机拥有量)为45%的养殖户所有。奶牛的平均产奶量约为10.5公斤/天，每天两次挤奶。此外，牛奶的平均自我消费量为6公斤/天，占牛奶产量的2.8%。饲料费用占生产成本的90%。年收入从99909 AD /牲畜单位(LU)到144821 AD /牲畜单位不等。这种变化是生产资源禀赋的函数。牛奶生产补贴占农民平均收入的58%，这表明奶牛养殖场的产量很低。今天，随着财政资源的急剧减少，乳制品生产发展政策应侧重于提高这些地区奶牛生产力和盈利能力的战略。
{"title":"Technical and economic performance of dairy cattle farming in mountain areas in Tizi-Ouzou, Algeria","authors":"A. Mouhous, F. Djellal, H. Guermah, Siamwalla Ammar","doi":"10.2298/BAH2004487M","DOIUrl":"https://doi.org/10.2298/BAH2004487M","url":null,"abstract":"The aim of this study is to explore the technical and economic aspects of\u0000 cattle farms in mountain areas and to identify their technical constraints\u0000 and potentialities. One hundred dairy cattle farmers were surveyed for seven\u0000 months. The results show that the average farm size is 13 dairy cows and\u0000 shows considerable variability at the sample level. For one-third of the\u0000 farms, stabling is almost permanent and feed concentrate used as supplement\u0000 (on average 7 kg /cow/day). 85% of the factors of production (useful\u0000 agricultural area and possession of tractor) are owned by 45% of the\u0000 breeders. Cow productivity averages is around 10.5 kg / day with two milkings\u0000 / day. In addition, the average self-consumption of milk is 6 kg / day, which\u0000 represents 2.8% of milk production. Feed expenses represent 90% of production\u0000 costs. Annual income range from 99 909 AD / livestock unit (LU) nearly 148\u0000 421 AD / livestock unit. This variation is a function of the endowment of\u0000 production resources. Subsidies for milk production represent 58% of the\u0000 average income of farmers, what shows the low yield of dairy cattle farms.\u0000 Today, with the drastic reduction in financial resources, dairy production\u0000 development policies should focus on strategies to improve cow productivity\u0000 and profitability in those areas.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121805081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Zutic, D. Vojinovic, S. Stanojević, B. Kureljušić, V. Milićević, J. Kureljusic, L. Spalević
Q-fever is antropozoonosis which is caused by Coxiella burnetii, obligate intracellular pathogen. The most significant characteristics of this pathogen are resistance and stability in the environment, possibility of aerosol dissemination, and very low infective dose. C. burnetii can infect domestic and wild animals, rodents, birds and ticks. Q fever in animals is generally asymptomatic, although it can lead to reproductive disorders during pregnancy. The main route of infection in humans is inhalation of contaminated aerosol and dust. Serological studies have shown the presence of antibodies to C. burnetii in the serum samples of cattle in Belgrade epizootiological area. Seroprevalence of 18% was found in farm bred cattle, while it was only 1.5% in individual breeding. In farm bred cows that have suffered abortion prevalence was 49%, and only 1.9% in individual breeding. The overall results indicate that the circulation of this pathogen in cattle, in Belgrade epizootiological area, poses a health risk, not only to the cattle, but also to the humans, especially persons working with animals. Q fever control programs most often recommend serological research and vaccination of animals. Accordingly, it is necessary to define a strategy for the implementation of biosecurity measures and preventive measures against Q fever.
{"title":"Seroprevalence of Coxiella burnetii in cattle in the Belgrade epizootiological area","authors":"J. Zutic, D. Vojinovic, S. Stanojević, B. Kureljušić, V. Milićević, J. Kureljusic, L. Spalević","doi":"10.2298/bah2003359z","DOIUrl":"https://doi.org/10.2298/bah2003359z","url":null,"abstract":"Q-fever is antropozoonosis which is caused by Coxiella burnetii, obligate\u0000 intracellular pathogen. The most significant characteristics of this\u0000 pathogen are resistance and stability in the environment, possibility of\u0000 aerosol dissemination, and very low infective dose. C. burnetii can infect\u0000 domestic and wild animals, rodents, birds and ticks. Q fever in animals is\u0000 generally asymptomatic, although it can lead to reproductive disorders\u0000 during pregnancy. The main route of infection in humans is inhalation of\u0000 contaminated aerosol and dust. Serological studies have shown the presence\u0000 of antibodies to C. burnetii in the serum samples of cattle in Belgrade\u0000 epizootiological area. Seroprevalence of 18% was found in farm bred cattle,\u0000 while it was only 1.5% in individual breeding. In farm bred cows that have\u0000 suffered abortion prevalence was 49%, and only 1.9% in individual breeding.\u0000 The overall results indicate that the circulation of this pathogen in\u0000 cattle, in Belgrade epizootiological area, poses a health risk, not only to\u0000 the cattle, but also to the humans, especially persons working with animals.\u0000 Q fever control programs most often recommend serological research and\u0000 vaccination of animals. Accordingly, it is necessary to define a strategy\u0000 for the implementation of biosecurity measures and preventive measures\u0000 against Q fever.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125755952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Vekić, M. Gvozdenovic, L. Perić, D. Savic, S. Jotanović, Mirjana Mitraković
A total of 3,600 floor eggs from a 59-week-old Cobb 500 parent flock were collected to examine the effects of shell cleanliness and cleaning treatment on incubation results. The eggs were divided into two equal groups according to the cleanliness of the shell: eggs with a visually clean shell (clean eggs) and eggs with a dirty shell (dirty eggs). Depending on the cleaning treatment, clean and dirty eggs were divided into three equal groups: eggs that were not cleaned at all (intact), eggs that were cleaned with metal wire (scraped eggs) and eggs that were washed (washed eggs). Cleaning treatment significantly affected egg weight loss (p = 0.057). The hatchability of set eggs was under significant influence of egg cleanliness (p = 0.018), while the hatchability of fertile eggs was under significant influence of egg cleanliness (p = 0.003) and cleaning treatment (p = 0.029). Significant influence of shell cleanliness (p = 0.000) and cleaning treatment (p = 0.000) on egg contamination was also observed. Early, middle and total embryonic mortality were not significantly influenced by shell cleanliness and cleaning treatment, in contrast to late mortality which was under significant influence of egg cleanliness (p = 0.028). The number of first grade chicks per incubator tray was significantly influenced by egg cleanliness (p = 0.018). Chick weight and length were not significantly affected by shell cleanliness and cleaning treatment. The study showed that washed eggs had a higher weight loss compared to intact and scraped eggs. Dirty eggs had a lower hatchability, a higher percentage of contamination and late mortality as well as a lower number of first grade chicks per incubation tray, compared to clean eggs. Cleaning treatments did not have a significantly positive effect on the incubation results of either clean or dirty eggs. Washing treatment had a particularly negative effect on dirty eggs as they had reduced hatchability and increased contamination. The absence of a positive effect of scraping and washing treatment on the incubation results makes justification of these cleaning treatments for floor eggs doubtful.
{"title":"Influence of floor egg shell cleanliness and cleaning treatment on hatchability and chick quality","authors":"M. Vekić, M. Gvozdenovic, L. Perić, D. Savic, S. Jotanović, Mirjana Mitraković","doi":"10.2298/bah2102099v","DOIUrl":"https://doi.org/10.2298/bah2102099v","url":null,"abstract":"A total of 3,600 floor eggs from a 59-week-old Cobb 500 parent flock were\u0000 collected to examine the effects of shell cleanliness and cleaning treatment\u0000 on incubation results. The eggs were divided into two equal groups according\u0000 to the cleanliness of the shell: eggs with a visually clean shell (clean\u0000 eggs) and eggs with a dirty shell (dirty eggs). Depending on the cleaning\u0000 treatment, clean and dirty eggs were divided into three equal groups: eggs\u0000 that were not cleaned at all (intact), eggs that were cleaned with metal\u0000 wire (scraped eggs) and eggs that were washed (washed eggs). Cleaning\u0000 treatment significantly affected egg weight loss (p = 0.057). The\u0000 hatchability of set eggs was under significant influence of egg cleanliness\u0000 (p = 0.018), while the hatchability of fertile eggs was under significant\u0000 influence of egg cleanliness (p = 0.003) and cleaning treatment (p = 0.029).\u0000 Significant influence of shell cleanliness (p = 0.000) and cleaning\u0000 treatment (p = 0.000) on egg contamination was also observed. Early, middle\u0000 and total embryonic mortality were not significantly influenced by shell\u0000 cleanliness and cleaning treatment, in contrast to late mortality which was\u0000 under significant influence of egg cleanliness (p = 0.028). The number of\u0000 first grade chicks per incubator tray was significantly influenced by egg\u0000 cleanliness (p = 0.018). Chick weight and length were not significantly\u0000 affected by shell cleanliness and cleaning treatment. The study showed that\u0000 washed eggs had a higher weight loss compared to intact and scraped eggs.\u0000 Dirty eggs had a lower hatchability, a higher percentage of contamination\u0000 and late mortality as well as a lower number of first grade chicks per\u0000 incubation tray, compared to clean eggs. Cleaning treatments did not have a\u0000 significantly positive effect on the incubation results of either clean or\u0000 dirty eggs. Washing treatment had a particularly negative effect on dirty\u0000 eggs as they had reduced hatchability and increased contamination. The\u0000 absence of a positive effect of scraping and washing treatment on the\u0000 incubation results makes justification of these cleaning treatments for\u0000 floor eggs doubtful.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"1961 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129468794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Nišavić, N. Milic, A. Radalj, A. Stanojković, L. Veljović
The bovine respiratory disease complex (BRDC) is multifactorial and results from interactions between host factors, environmental factors, and pathogens. A virus, as an initial pathogen alters the animal?s immunity supporting the bacterial colonization of the lower respiratory tract. Bovine herpesvirus 1 (BHV-1), bovine parainfluenza virus 3 (BPIV-3), and bovine respiratory syncytial virus (BRSV) are among the most significant viruses associated with BRDC. The disease most often affects young and older immunosuppressed animals. Laboratory results depend on the selected sampling site of the respiratory tract and proper timing during the period of virus shedding. The samples for testing mostly include nasal or nasopharyngeal swabs, tracheal wash, bronchoalveolar lavage fluid, or necropsy specimens. Virus isolation, although considered as the gold standard, is time-consuming and depends on the virus species and sampling conditions. Most of the virus identification methods used today are molecular assays (conventional and real-time PCR or RT-PCR) that are rapid, sensitive, and specific, which is of the essence in veterinary diagnostic laboratories. DNA sequencing is mostly used to detect specific genetic mutations and for molecular epidemiology of disease outbreaks. Serological diagnosis is performed based on the detection of specific antibody presence after infection of seronegative animals or a 4-fold specific antibody titer rise in paired serum samples. Different assays are available, including virus neutralization, complement fixation, haemagglutination inhibition, and ELISA. The early and reliable diagnosis is beneficial in the management and control of BRDC and is the basis of a timely treatment and prevention program.
{"title":"Laboratory diagnostics of bovine parainfluenza-3 virus, bovine herpesvirus 1, and bovine respiratory syncytial virus associated with bovine respiratory disease","authors":"J. Nišavić, N. Milic, A. Radalj, A. Stanojković, L. Veljović","doi":"10.2298/BAH2101001N","DOIUrl":"https://doi.org/10.2298/BAH2101001N","url":null,"abstract":"The bovine respiratory disease complex (BRDC) is multifactorial and results\u0000 from interactions between host factors, environmental factors, and\u0000 pathogens. A virus, as an initial pathogen alters the animal?s immunity\u0000 supporting the bacterial colonization of the lower respiratory tract. Bovine\u0000 herpesvirus 1 (BHV-1), bovine parainfluenza virus 3 (BPIV-3), and bovine\u0000 respiratory syncytial virus (BRSV) are among the most significant viruses\u0000 associated with BRDC. The disease most often affects young and older\u0000 immunosuppressed animals. Laboratory results depend on the selected sampling\u0000 site of the respiratory tract and proper timing during the period of virus\u0000 shedding. The samples for testing mostly include nasal or nasopharyngeal\u0000 swabs, tracheal wash, bronchoalveolar lavage fluid, or necropsy specimens.\u0000 Virus isolation, although considered as the gold standard, is time-consuming\u0000 and depends on the virus species and sampling conditions. Most of the virus\u0000 identification methods used today are molecular assays (conventional and\u0000 real-time PCR or RT-PCR) that are rapid, sensitive, and specific, which is\u0000 of the essence in veterinary diagnostic laboratories. DNA sequencing is\u0000 mostly used to detect specific genetic mutations and for molecular\u0000 epidemiology of disease outbreaks. Serological diagnosis is performed based\u0000 on the detection of specific antibody presence after infection of\u0000 seronegative animals or a 4-fold specific antibody titer rise in paired\u0000 serum samples. Different assays are available, including virus\u0000 neutralization, complement fixation, haemagglutination inhibition, and\u0000 ELISA. The early and reliable diagnosis is beneficial in the management and\u0000 control of BRDC and is the basis of a timely treatment and prevention\u0000 program.","PeriodicalId":249404,"journal":{"name":"Biotehnologija u stocarstvu","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129551209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：