RESUMO
In the retrospective study of soil-borne diseases of cattle in Zambia, malignant edema and blackquarter were widespread. One hundred and sixty-five cases with malignant edema and 103 cases with blackquarter were reported between 1985 and 1997. It was found that specific soil-conditions associate the emergence of the soil-borne diseases. Soil samples from five areas in Zambia were examined for the presence of genus Clostridium. Direct immunofluorescent assay (IFA) examination showed that C. septicum, C. novyi and C. chauvoei were detected in the soil of specific areas in Zambia, respectively. Causal organisms such as C. perfringens were isolated from the soil samples. The information of area-specific distribution of Clositridium species may give an efficient program in protecting cattle and man.
Assuntos
Doenças dos Bovinos/microbiologia , Infecções por Clostridium/veterinária , Clostridium perfringens/isolamento & purificação , Microbiologia do Solo , Animais , Antígenos de Bactérias/análise , Bovinos , Infecções por Clostridium/microbiologia , Clostridium perfringens/química , Edema/veterinária , Técnica Direta de Fluorescência para Anticorpo/veterinária , Estudos Retrospectivos , ZâmbiaRESUMO
The ability of anti-oestradiol immunoglobulin to withhold oestradiol-17 beta from its target tissue was examined. The total oestradiol-17 beta binding capacity present in in-vitro incubations or injected into mice intravenously was related to the amount of [3H]oestradiol present in the media or intravenously injected into the animals respectively. When the ratio of binding capacity to [3H]oestradiol was above 74:1, [3H]oestradiol was successfully withheld from uterine tissue in vitro and in vivo. Injecting anti-oestradiol immunoglobulin into mice before administration of a tube-locking dose of oestradiol-17 beta ensured normal passage of ova through the oviduct. Daily administration of anti-oestradiol immunoglobulin to PMSG-hCG stimulated mice (starting 72 h before hCG injection) induced retention of ova for at least 2 days beyond the time when all ova had left the oviducts of control animals. The binding capacity: oestradiol-17 beta concentration ratios of sera from these animals were greater than 250:1 throughout the experimental period. Non-specific immunoglobulin had no such effects, indicating the specificity of the anti-oestradiol immunoglobulin response.
