Ceskoslovenska epidemiologie, mikrobiologie, imunologie最新文献

The new modification (HEA test) is based on the presence of a singularly distinct agglutination of native horse erythrocytes in a serum dilution 1:10 and more from cases with Epstein-Barr virus infectious mononucleosis. In 1665 sera the HEA test was equally often positive as the OCH test (in 5.2%) whereas the IM test with formal-treated horse erythrocytes was positive only in 3.7%. The sensitivity of the IM test in comparison with the OCH test was 61%, the specificity 99.5%. The sensitivity of the HEA test in comparison with the OCH test was 76%, the specificity 98.7%. The specificity of the HEA test in a group of 52 sera without IgG antibodies to EB-viral capsid antigen (EB VCA) was 94%, in another group of 130 sera from hepatitis cases it was 98%. In 103 pairs of sera from infants aged 1-5 years the positivity of the OCH test, HEA test, IgM antibodies to EB VCA and the four-fold rise in the titre of EB-viral IgG were, 20%, 16%, 23% and 24% respectively. Analogous values in 159 pairs of sera from older subjects were 42%, 40%, 38% and 29%. The HEA test is recommended as useful adjunct to the OCH test for the detection of heterophile antibodies even in young children.

In 1984-1991 in the microbiological laboratory in Komárno (Slovak Republic) 4224 (100%) smears with the diagnosis of otitis were examined. From 138 (3.26%) of smears microscopic filamentous fungi were isolated, most frequently aspergillae from the group Aspergillus niger (34.1%), Aspergillus flavus (29.8%) and Aspergillus fumigatus (21.8% of 138 isolates). The strains of other species of filamentous micromycetes were found only rarely. A review on the incidence of filamentous micromycetes in otitis in different regions, based on data in the literature is presented.

The authors tested the effect of a new disinfectant Lautericide produced by Qualichem Co. Neratovice which contains as the active agent acetate amine of coconut acid. For experiments standard methods were used and standard strains for testing of the following microbial strains: St. aureus, E. coli, Ps. aeruginosa, Proteus vulgaris, Serratia marcescens, Candida albicans, spores of Bacillus subtilis, M. tuberculosis, M. fortuitum, M. avium. As a model virus E. coli bacteriophage OX 174 was used. In concentrations from 0.04% to 0.5% and exposures from 2 to 10 minutes Lautercide exerted a bactericidal and fungicidal action. On spores of B. subtilis the preparation was ineffective even in a 10% concentration and 32-minute exposure. Devitalization of mycobacteria occurred after 15 min. action of Lautercide on M. tuberculosis and M. fortuitum, in M. avium in a 10% concentration in 60 min. Lautercide is ineffective against small resistant viruses without an integument. It is recommended to use Lautercide in a 1% aqueous solution for a one-stage disinfection combined with cleaning in the health services, veterinary medicine and in the field of communal hygiene. Before cleaning objects contaminated with infectious material, 5% Lautercide with 30 min. exposure is recommended. In disinfection of objects contaminated with mycobacteria it is recommended to use a 5% solution with 10-minute exposure for M. tuberculosis and M. fortuitum and a 10% solution for M. avium with 60-minute exposure.

The first finding of body lice in Czechoslovakia since year 1945 is demonstrated. The determination of the species is based on the location of the louse on the body of the infested person and on the significant differences in the length of tibia of middle legs in these lice and those collected from the head of children. Local eradication was achieved by using formulation containing permethrin, against head lice.

The author presents an account of phagotypes of 70 strains of Salmonella paratyphi B isolated in 1986-1991 incl., from patients suffering from typhus B and registered carriers, isolates from river water and also from three new cases of carriers in Czechoslovakia. These isolated strains were sent for typing of Salmonellae to a Bratislava department for phagotyping. According to lytic findings with standard bacteriophages the strains were classified into 8 types. Another group is formed by strains which cannot be typed in the critical dilution (RTD) nor in its tenfold concentration (19.1%). During the investigation period the subtype 3aI (38.3%) and the phage type Taunton (21.9%) were most frequent.

To evaluate the incidence of natural foci of tick-borne encephalitis in the Slovak Republic data of the hygiene service on the morbidity from tick-borne encephalitis during the period from 1961-1988 were used as well as data from the literature and results of the author's field studies on the incidence of the common tick. The main foci of tick-borne encephalitis are in the West Slovakian region, in the Záhorské lowland, in the Váh valley up to the distrikt of Povázská Bystrica, in the area of the Low Carpathian mountains, Tribec, Vtácnik, the Nitra and Hron hills, and Kovácov hills, in the Central Slovakian region in the Krupin hills and in the East Slovakian region in the Slovak karst and Slanské hills. The incidence of common ticks and foci of tick-borne encephalitis is linked to the original oak grove communities. In Slovakia the latter comprise hornbean and oak forests, oak groves and thermophile oak forests. Areas of original communities of beech woods and spruces which grow in higher altitudes do not provide favourable conditions for the development of the common tick. Rare foci of tick-borne encephalitis of a mountainous type found in Slovakia survive probably due to the extremely favourable microclimatic conditions in these areas. Also the hygrophilous communities of alders, moorlands and dry steppes, original as well as cultivated ones, are not suitable for the common tick. This is why ticks are not found in central, northern and northeastern Slovakia, in the Rye island and lowland along the Tisa river.(ABSTRACT TRUNCATED AT 250 WORDS)

The authors describe the basic technique of cultivation and isolation of urogenital mycoplasmas, focused on their detection. They describe methods of collection of samples, principles of cultivation, dilution of samples and their sub-passage recommended to ensure a higher detection rate.

The authors describe the finding of Nocardia asteroides from a haemoculture in a patient with right-sided pneumonia and several predisposing factors (TB, chronic bronchitis, anamnestic hepatitis, chronic hepatopathy, anaemia, ethylism and a neoplasm revealed in the final stage). Early bacteriological diagnosis and aimed antimicrobial therapy led to radical improvement of the very dramatic clinical condition. The authors discuss the possible higher incidence of the infectious agent, which previously was detected only very rarely.

In 21 strains of E. coli isolated from patients with cystitis and asymptomatic bacteriuria the authors assessed the group, mannososensitive and mannoresistant agglutination of human, bovine, chick, guinea pig, sheep and pig erythrocytes, the production of haemolysis, colicins, aerobactin, the capacity of strains to induce oedema on mouse paws, the lethal effect in mice, the resistance to tetracycline, streptomycin, chloramphenicol, kanamycin, ampicillin and sulfamethoxidine, the transmission of resistance and sensitivity of strains to the action of fresh human serum. In ten strains the authors recorded also the production of haemolysin and the lethality for mice, in four strains the production of colicin V. production of aerobactin and serum resistance. In three strains the aerobactin production was recorded concurrently with the haemolysin production. In none of the samples P. fimbriae were found.