C. M. Martínez-Bravo, Salim Máttar, Marco González-Tous
Conocer y descifrar los cambios o mutaciones que experimentan los virus en el tiempo es crucial para desarrollar las estrategias de vigilancia epidemiológica del SARS CoV 2. El virus tiene un ARN monocatenario y posee mecanismos de evolución llamados mutaciones, las cuales le confieren eficacia biológica para aumentar su transmisibilidad, modificar su patogenicidad, con lo cual evaden la inmunidad del huésped, modificando así la respuesta antigénica. Hace algún tiempo se creía que los cambios en los coronavirus eran más lentos que en la mayoría de los ARN virus, pero hoy se han observado mutaciones relevantes en SARS CoV-2 (1).
{"title":"¿El SARS CoV-2 fue realmente de origen zoonótico?","authors":"C. M. Martínez-Bravo, Salim Máttar, Marco González-Tous","doi":"10.21897/rmvz.2481","DOIUrl":"https://doi.org/10.21897/rmvz.2481","url":null,"abstract":"Conocer y descifrar los cambios o mutaciones que experimentan los virus en el tiempo es crucial para desarrollar las estrategias de vigilancia epidemiológica del SARS CoV 2. El virus tiene un ARN monocatenario y posee mecanismos de evolución llamados mutaciones, las cuales le confieren eficacia biológica para aumentar su transmisibilidad, modificar su patogenicidad, con lo cual evaden la inmunidad del huésped, modificando así la respuesta antigénica. Hace algún tiempo se creía que los cambios en los coronavirus eran más lentos que en la mayoría de los ARN virus, pero hoy se han observado mutaciones relevantes en SARS CoV-2 (1).","PeriodicalId":49598,"journal":{"name":"Revista Mvz Cordoba","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68776848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Maria Fernanda Londoño-López, Juan Carlor González-Corrales, Juan Carlos Rincón-Florez
Objectives. To analyze the cysteine-protease (CP) gene sequences of Tritrichomonas spp. reported in GenBank, and develop a phylogenetic analysis to help clarify the possibility of transmission between species. Materials and Methods. The CP sequences of Tritrichomonas spp. available in GenBank were analyzed and aligned to identify polymorphic sites. The best nucleotide substitution model was determined, and phylogenetic trees were constructed for each gene, using Trichomonas vaginalis
{"title":"Análisis filogenético de secuencias de Cistein-Proteasas de Tritrichomonas foetus, ¿salto de la barrera de especies?","authors":"Maria Fernanda Londoño-López, Juan Carlor González-Corrales, Juan Carlos Rincón-Florez","doi":"10.21897/rmvz.1906","DOIUrl":"https://doi.org/10.21897/rmvz.1906","url":null,"abstract":"Objectives. To analyze the cysteine-protease (CP) gene sequences of Tritrichomonas spp. reported in GenBank, and develop a phylogenetic analysis to help clarify the possibility of transmission between species. Materials and Methods. The CP sequences of Tritrichomonas spp. available in GenBank were analyzed and aligned to identify polymorphic sites. The best nucleotide substitution model was determined, and phylogenetic trees were constructed for each gene, using Trichomonas vaginalis","PeriodicalId":49598,"journal":{"name":"Revista Mvz Cordoba","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42934074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Objective. To assess the effect of the inclusion of viscera hydrolyzate meal in diets for trout fry, “Kamloop” variety, in terms of weight, length and biomass gains, apparent feed conversion, and survival. Materials and methods. This essay was developed at the Guirapungo Corponariño Environmental and Fish Farming Center, in eight concrete pools, subdivided each pool, into three compartments of equal dimensions. An Unrestricted Random Design (URD) was used, made up of 1680 trout fry, with an average stocking weight of 1.24±0.024 g, distributed in four treatments, six replications per treatment, for a total of 24 units experimental, with 70 fish per experimental unit
{"title":"Efecto de harina de hidrolizado de vísceras en el crecimiento de trucha arcoíris (Oncorhynchus mykiss)","authors":"J. N. López-Macías, J. Salas-Benavides","doi":"10.21897/rmvz.1989","DOIUrl":"https://doi.org/10.21897/rmvz.1989","url":null,"abstract":"Objective. To assess the effect of the inclusion of viscera hydrolyzate meal in diets for trout fry, “Kamloop” variety, in terms of weight, length and biomass gains, apparent feed conversion, and survival. Materials and methods. This essay was developed at the Guirapungo Corponariño Environmental and Fish Farming Center, in eight concrete pools, subdivided each pool, into three compartments of equal dimensions. An Unrestricted Random Design (URD) was used, made up of 1680 trout fry, with an average stocking weight of 1.24±0.024 g, distributed in four treatments, six replications per treatment, for a total of 24 units experimental, with 70 fish per experimental unit","PeriodicalId":49598,"journal":{"name":"Revista Mvz Cordoba","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47577011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Martínez-Rocha, Rodolfo Ramírez-Valverde, R. Núñez-Domínguez, J. G. García-Muñiz, G. M. Parra-Bracamonte
Objective. To characterize growth curves and reproductive performance of Romosinuano cows in Mexico. Materials and methods. Weight and age records (928) of females (117) for growth traits and calving records (459) of cows (113) for reproductive traits were analyzed. Four non-linear mixed models were adjusted to describe the growth curves. Indicators of age at 50% of maturity
{"title":"Comportamiento de crecimiento y reproductivo en hembras bovinas Romosinuano","authors":"R. Martínez-Rocha, Rodolfo Ramírez-Valverde, R. Núñez-Domínguez, J. G. García-Muñiz, G. M. Parra-Bracamonte","doi":"10.21897/rmvz.2033","DOIUrl":"https://doi.org/10.21897/rmvz.2033","url":null,"abstract":"Objective. To characterize growth curves and reproductive performance of Romosinuano cows in Mexico. Materials and methods. Weight and age records (928) of females (117) for growth traits and calving records (459) of cows (113) for reproductive traits were analyzed. Four non-linear mixed models were adjusted to describe the growth curves. Indicators of age at 50% of maturity","PeriodicalId":49598,"journal":{"name":"Revista Mvz Cordoba","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45433539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ítalo Câmara-de-Almeida, Fabrício Albani-Oliveira, A. P. Madureira, G. Barioni, Ciro A Alves-Torres
Objective. To evaluate the efficiency of equine chorionic gonadotropin (eCG) and follicle stimulating hormone (FSH) on the pregnancy rate of crossbred cows from different body condition score (BCS) in the postpartum period in timed artificial insemination (TAI). Material and methods. The cows were subjected to the same hormone protocol: Day zero (D0), progesterone-release intravaginal device (PRID) and 2 mg estradiol benzoate (EB); D8, withdrawal of PRID, application 0.150 mg of prostaglandin. On D8, the animals were distributed into three treatments: 1 – (TeCG; n = 98) injection of 300 IU eCG; 2 – (TFSH; n = 84) injection of 20 mg of FSH and; 3 – (Control; n = 115) without further treatment. On D9, all animals received 1 mg of EB; D10, TAI of all the cows. After 30 days from TAI, ultrasound diagnosis of pregnancy was performed. Results. Pregnancy rate did not differ among eCG (52.04%), FSH (40.47%), and Control (40.00%) treated cows (p>0.05). In cows with low body condition, the pregnancy rate was higher (p<0.05) for cows treated with eCG (41.46%) when compared to FSH (18.18%) and Control (17.07%) cows. The postpartum interval among treatments was similar (p>0.05) (35–65 or 66–95days). Conclusions. The use of eCG or FSH did not result in an increase in the pregnancy rate when compared to the control treatment; however, eCG improved the pregnancy rate of cows with low body condition scores.
{"title":"Effect of follicular growth promoters on timed artificial insemination in dairy cows.","authors":"Ítalo Câmara-de-Almeida, Fabrício Albani-Oliveira, A. P. Madureira, G. Barioni, Ciro A Alves-Torres","doi":"10.21897/rmvz.1966","DOIUrl":"https://doi.org/10.21897/rmvz.1966","url":null,"abstract":"Objective. To evaluate the efficiency of equine chorionic gonadotropin (eCG) and follicle stimulating hormone (FSH) on the pregnancy rate of crossbred cows from different body condition score (BCS) in the postpartum period in timed artificial insemination (TAI). Material and methods. The cows were subjected to the same hormone protocol: Day zero (D0), progesterone-release intravaginal device (PRID) and 2 mg estradiol benzoate (EB); D8, withdrawal of PRID, application 0.150 mg of prostaglandin. On D8, the animals were distributed into three treatments: 1 – (TeCG; n = 98) injection of 300 IU eCG; 2 – (TFSH; n = 84) injection of 20 mg of FSH and; 3 – (Control; n = 115) without further treatment. On D9, all animals received 1 mg of EB; D10, TAI of all the cows. After 30 days from TAI, ultrasound diagnosis of pregnancy was performed. Results. Pregnancy rate did not differ among eCG (52.04%), FSH (40.47%), and Control (40.00%) treated cows (p>0.05). In cows with low body condition, the pregnancy rate was higher (p<0.05) for cows treated with eCG (41.46%) when compared to FSH (18.18%) and Control (17.07%) cows. The postpartum interval among treatments was similar (p>0.05) (35–65 or 66–95days). Conclusions. The use of eCG or FSH did not result in an increase in the pregnancy rate when compared to the control treatment; however, eCG improved the pregnancy rate of cows with low body condition scores.","PeriodicalId":49598,"journal":{"name":"Revista Mvz Cordoba","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46823289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Débora Elizabeth Hernández-Pérez, C. Gil-Durán, R. Chávez-Rosales, R. García-Rico
Objective. Analyzed the effect of xylan and rice husk as sole sources of carbon on the FAE activity and expression of faeA and faeB genes of Penicillium rubens (Wisconsin 54-1255), in submerged fermentation. Materials and methods. The fermentations were carried out for 24, 48, and 72 h (28°C/250 rpm), in flasks with a modified Sakamoto medium. FAE activity was determined using the synthetic substrate Ethyl 4-hydroxy-3-methoxycinnamate. The transcription of faeA and faeB was analyzed by RT-PCR. The PCR products were resolved by electrophoresis and analyzed by densitometry. Results. The analysis of gene expression showed that the use of xylan had a positive effect on the expression of both genes. The highest transcriptional activity of both faeA and faeB was detected at 48 h. On the other hand, rice husk showed negative results. The data obtained when the FAE activity was determined, supported the results observed in the gene expression analysis. Conclusion. Different from xylan the rice husk did not demonstrate an inducer effect on the feruloyl esterase activity in P. rubens.
{"title":"Differential effect of rice husk and xylan on feruloyl esterase activity in Penicillium rubens.","authors":"Débora Elizabeth Hernández-Pérez, C. Gil-Durán, R. Chávez-Rosales, R. García-Rico","doi":"10.21897/rmvz.1959","DOIUrl":"https://doi.org/10.21897/rmvz.1959","url":null,"abstract":"Objective. Analyzed the effect of xylan and rice husk as sole sources of carbon on the FAE activity and expression of faeA and faeB genes of Penicillium rubens (Wisconsin 54-1255), in submerged fermentation. Materials and methods. The fermentations were carried out for 24, 48, and 72 h (28°C/250 rpm), in flasks with a modified Sakamoto medium. FAE activity was determined using the synthetic substrate Ethyl 4-hydroxy-3-methoxycinnamate. The transcription of faeA and faeB was analyzed by RT-PCR. The PCR products were resolved by electrophoresis and analyzed by densitometry. Results. The analysis of gene expression showed that the use of xylan had a positive effect on the expression of both genes. The highest transcriptional activity of both faeA and faeB was detected at 48 h. On the other hand, rice husk showed negative results. The data obtained when the FAE activity was determined, supported the results observed in the gene expression analysis. Conclusion. Different from xylan the rice husk did not demonstrate an inducer effect on the feruloyl esterase activity in P. rubens.","PeriodicalId":49598,"journal":{"name":"Revista Mvz Cordoba","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47473792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. P. Zárate-Martínez, J. V. Rosete-Fernández, G. A. Socci-Escatell, Abraham Fragoso-Islas, S. Olazarán-Jenkins, Lorenzo Granados-Zurita, Á. Ríos-Utrera
Objective. To determine the prevalence of antibodies against Neospora caninum (PSA) in beef and dual-purpose cattle from the Central and Southern Gulf of Mexico regions, as well as to evaluate its association with the reproductive status (RS) of the cow (pregnant, not pregnant). Materials and methods. Blood samples were taken from 422 cows. Antibodies were detected with a commercial ELISA kit. PSA was analyzed with a logistic regression model that included state, township nested within state, and ranch nested within township. Results. The states of Tabasco, Puebla and Veracruz had similar PSA (p>0.05). The mean PSA for the three states was 24.0%. The PSA varied from 7.8 to 43.3% across townships. In Puebla, the PSA in cattle from San José Acateno township was more than two-fold greater than that in cattle from Hueytamalco and Nauzontla townships (p<0.05). In Tabasco, Cunduacán, Huimanguillo and Ranchería El Puente townships showed similar (p>0.05) PSA. In Veracruz, cows from Cotaxtla and Medellín de Bravo townships presented higher (p<0.05) PSA than those from San Rafael township. The RS of seropositive females was similar (p>0.05) to that of seronegative females. Conclusions. The three states had similar PSA. All the herds had antibodies against N. caninum, suggesting that this parasite is amply distributed in the three states. In addition, great variation existed among herds and among townships; finally, the presence of N. caninum antibodies was not associated with the RS of the cow.
目标。确定来自墨西哥湾中部和南部地区的肉牛和两用牛中犬新孢子虫(PSA)抗体的流行率，并评估其与母牛(怀孕和未怀孕)的生殖状态(RS)的关系。材料和方法。抽取了422头牛的血液样本。抗体检测采用商用ELISA试剂盒。采用logistic回归模型分析PSA，包括州、州内乡镇和乡镇内牧场。结果。塔巴斯科州、普埃布拉州和韦拉克鲁斯州的PSA相似(p < 0.05)。这三个州的平均PSA为24.0%。各乡镇的PSA从7.8 - 43.3%不等。在普埃布拉州，San jos Acateno镇牛的PSA是Hueytamalco和Nauzontla镇牛的2倍多(p0.05)。在韦拉克鲁斯州，Cotaxtla和Medellín de Bravo镇的奶牛血清阳性率高于阴性母牛(p0.05)。结论。这三个州的PSA相似。所有畜群都有抗犬奈瑟菌的抗体，表明这种寄生虫在这三个州广泛分布。此外，畜群之间和乡镇之间也存在较大差异;最后，牛链球菌抗体的存在与牛的RS无关。
{"title":"Prevalence of Neospora caninum bovine serum antibodies in the Central and Eastern regions of Mexico","authors":"J. P. Zárate-Martínez, J. V. Rosete-Fernández, G. A. Socci-Escatell, Abraham Fragoso-Islas, S. Olazarán-Jenkins, Lorenzo Granados-Zurita, Á. Ríos-Utrera","doi":"10.21897/rmvz.1996","DOIUrl":"https://doi.org/10.21897/rmvz.1996","url":null,"abstract":"Objective. To determine the prevalence of antibodies against Neospora caninum (PSA) in beef and dual-purpose cattle from the Central and Southern Gulf of Mexico regions, as well as to evaluate its association with the reproductive status (RS) of the cow (pregnant, not pregnant). Materials and methods. Blood samples were taken from 422 cows. Antibodies were detected with a commercial ELISA kit. PSA was analyzed with a logistic regression model that included state, township nested within state, and ranch nested within township. Results. The states of Tabasco, Puebla and Veracruz had similar PSA (p>0.05). The mean PSA for the three states was 24.0%. The PSA varied from 7.8 to 43.3% across townships. In Puebla, the PSA in cattle from San José Acateno township was more than two-fold greater than that in cattle from Hueytamalco and Nauzontla townships (p<0.05). In Tabasco, Cunduacán, Huimanguillo and Ranchería El Puente townships showed similar (p>0.05) PSA. In Veracruz, cows from Cotaxtla and Medellín de Bravo townships presented higher (p<0.05) PSA than those from San Rafael township. The RS of seropositive females was similar (p>0.05) to that of seronegative females. Conclusions. The three states had similar PSA. All the herds had antibodies against N. caninum, suggesting that this parasite is amply distributed in the three states. In addition, great variation existed among herds and among townships; finally, the presence of N. caninum antibodies was not associated with the RS of the cow.","PeriodicalId":49598,"journal":{"name":"Revista Mvz Cordoba","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45599467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. H. Severino-Lendechy, Felipe Montiel-Palacios, Hiram Gómez-de-Lucio, J. A. Peralta-Torres, J. C. Segura Correa
Objective. Determine the effect of restricted suckling, early weaning and feed supplementation on weight gains and plasma cortisol concentration of Simbrah calves. Materials and methods. One hundred and twenty 15-day-old lactating calves were distributed in two treatments: T1) calves with restricted suckling, early weaning and feed supplementation (n=30 males/n=30 females); and T2)
{"title":"Efecto del amamantamiento restringido y complementación alimenticia sobre el peso y cortisol en becerros Simbrah","authors":"V. H. Severino-Lendechy, Felipe Montiel-Palacios, Hiram Gómez-de-Lucio, J. A. Peralta-Torres, J. C. Segura Correa","doi":"10.21897/rmvz.1958","DOIUrl":"https://doi.org/10.21897/rmvz.1958","url":null,"abstract":"Objective. Determine the effect of restricted suckling, early weaning and feed supplementation on weight gains and plasma cortisol concentration of Simbrah calves. Materials and methods. One hundred and twenty 15-day-old lactating calves were distributed in two treatments: T1) calves with restricted suckling, early weaning and feed supplementation (n=30 males/n=30 females); and T2)","PeriodicalId":49598,"journal":{"name":"Revista Mvz Cordoba","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43093294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Pámanes-Carrasco, M. Murillo-Ortiz, D. Reyes-Jáquez, R. Valencia, Esperanza Herrera Torres
Objective.This research aimed to evaluate the inclusion of Cucurbita foetidissima (BG) leaves as a partial or total substitution of alfalfa hay (AH) in beef cattle diets on in vitro methane output, gas kinetics and volatile fatty acids production. Materials and Methods.Five experimental treatments were formulated with the inclusion of BG as alfalfa hay (AH) substitute at 0, 25, 50, 75 and 100% in experimental treatments denominated CON (control), BG25, BG50, BG75 and BG100, respectively. Results.Lignin and organic matter decreased with BG inclusion (p<0.05). However, NDF, CT and TPC increased with higher levels of BG (p<0.05). Maximum gas production diminished with BG inclusion (p<0.05); whereas, microbial protein production, specific gas production rate and latency period were not affected (p>0.05). Methane production decreased linearly with BG inclusion (p<0.05). Nevertheless, CO2 production showed no changes with inclusion of graded levels of BG in the experimental treatments (p>0.05). Additionally, acetate and butyrate were not affected by BG inclusion (p>0.05); although, propionate increased linearly among treatments (p<0.05). Furthermore, inclusion of 75% of BG reduced 31% in vitro methane production without changes in CO2 production, suggesting an inhibition of endogenous methanogenesis. Conclusions.These results promote the inclusion of BG leaves as a potential and environmentally friendly forage source for beef cattle feeding.
{"title":"Reduction in the in vitro ruminal methane production with the inclusion of Cucurbita foetidissima","authors":"G. Pámanes-Carrasco, M. Murillo-Ortiz, D. Reyes-Jáquez, R. Valencia, Esperanza Herrera Torres","doi":"10.21897/rmvz.1941","DOIUrl":"https://doi.org/10.21897/rmvz.1941","url":null,"abstract":"Objective.This research aimed to evaluate the inclusion of Cucurbita foetidissima (BG) leaves as a partial or total substitution of alfalfa hay (AH) in beef cattle diets on in vitro methane output, gas kinetics and volatile fatty acids production. Materials and Methods.Five experimental treatments were formulated with the inclusion of BG as alfalfa hay (AH) substitute at 0, 25, 50, 75 and 100% in experimental treatments denominated CON (control), BG25, BG50, BG75 and BG100, respectively. Results.Lignin and organic matter decreased with BG inclusion (p<0.05). However, NDF, CT and TPC increased with higher levels of BG (p<0.05). Maximum gas production diminished with BG inclusion (p<0.05); whereas, microbial protein production, specific gas production rate and latency period were not affected (p>0.05). Methane production decreased linearly with BG inclusion (p<0.05). Nevertheless, CO2 production showed no changes with inclusion of graded levels of BG in the experimental treatments (p>0.05). Additionally, acetate and butyrate were not affected by BG inclusion (p>0.05); although, propionate increased linearly among treatments (p<0.05). Furthermore, inclusion of 75% of BG reduced 31% in vitro methane production without changes in CO2 production, suggesting an inhibition of endogenous methanogenesis. Conclusions.These results promote the inclusion of BG leaves as a potential and environmentally friendly forage source for beef cattle feeding.","PeriodicalId":49598,"journal":{"name":"Revista Mvz Cordoba","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48370593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. Yupari-Azabache, J. Díaz-Ortega, Angela Rodríguez-Diaz, ana Peralta-Iparraguirre
Objective: This research aims to analyze the relation between biological, social and cultural factors regarding the attitudes and preventive measures against COVID-19 among citizens of TrujilloPeru. Material and Methods: This is a descriptive research, with a quantitative approach and a correlational, prospective and design. A previously validated questionnaire was used to collect certain
{"title":"Factores asociados a las actitudes y prácticas preventivas frente a la pandemia del COVID-19","authors":"I. Yupari-Azabache, J. Díaz-Ortega, Angela Rodríguez-Diaz, ana Peralta-Iparraguirre","doi":"10.21897/rmvz.2052","DOIUrl":"https://doi.org/10.21897/rmvz.2052","url":null,"abstract":"Objective: This research aims to analyze the relation between biological, social and cultural factors regarding the attitudes and preventive measures against COVID-19 among citizens of TrujilloPeru. Material and Methods: This is a descriptive research, with a quantitative approach and a correlational, prospective and design. A previously validated questionnaire was used to collect certain","PeriodicalId":49598,"journal":{"name":"Revista Mvz Cordoba","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47238279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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