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- Impact of cattle keeping systems on the occurrence of Cysticercus bovis in ecologically working agricultural companies with cattle breeding - For decades the routine meat inspection for the zoonotic parasite Cysticercus bovis has been conducted by way of ante and post mortem examination only. According to VO (EG) 854/ 2004 cuts on the cysticerci of Taenia saginata („Finnenschnitte“) are prescribed by law. This method of diagnosis is based on a visual examination, leading to a significant underestimation of the prevalence and also of consequences on human health as well. The present study tries to identify risks in cattle keeping systems and environmental conditions and tries also to find out factors which minimize the risk of the occurrence of Cysticercus bovis. For that a questionnaire was developed. 38 ecologically run cattle farms were visited and data collected. In 11 of these farms Taenia saginata had occurred before. The farms under examination were dairy farms, mother cow farms and also mixed farms. The collected operation data were statistically examined using the IBM SPSS Statistics 23 program statistically (determination of frequencies, crosstabs, Chi-squared tests, Odds ratios, resume of selected variables and logistic regression). With the method of Cluster analysis (Spearmans rank correlation coefficient, distance measure, merger algorithm by using the Ward procedure and Scree-Plot) farm structures were identified and served as a base for identifying farms of similar structure and categorizing them. Veterinary farm service was identified as a risk-minimizing factor for the occurrence of Cysticercus bovis (p value: 0,031). After that an investigation was carried out into possible correlations between other factors or structures and the veterinary farm service. The use of hygiene rules and cleaning of stables (well-swept) turned out to be significant factors correlating with veterinary farm service. A prophylactic use of antiparasitic agents did not seem to be significant, but in mathematical term, farms with veterinary farm service applied antiparasitic agents significantly more frequently. The cluster analysis showed similar farm structures and environmental conditions in some farms. These clusters were investigated for cysticerci: In cluster 1 14,3% cysticerci, in cluster 2 50% cysticerci, in cluster 3 30% cysticerci and in cluster 4 0% cysticerci were found. Main characteristics of cluster 2 were inter alia a higher risk in the areas of tourism and water reservoirs, main characteristics of cluster 4 were a lower risk in terms of flooded areas and storage of dung. A general analysis of similiar farms including work practices, structures of hygiene and determination of medical data (cysticerci found in cattle holding farms, taeniosis in humans) could serve as a base for determining farms which are in principle at risk and as a base for expanding the traditional post mortem examination. This base could be used to work together with the human medicine in order to use existing data in a new way, to combine data in veterinary and human medicine, to create a new data interconnected system or to come to a data exchange system. New outbreaks of cysticercosis and taeniosis could be recorded immediately and farms exposed to higher risks could be identified and be treated preventively under cooperation with the respective veterinarian. In cooperation with veterinary farm service a risk based identification of farms at risk could serve as a supplement to the visual meat inspection as traditionally practised today.
Acquisto del libro
Einfluss von Haltungssystemen auf das Auftreten von Cysticercus bovis in ökologisch wirtschaftenden Landwirtschaftsbetrieben mit Rinderhaltung, Pascale Kyle Theobald
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- Pubblicato
- 2017
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