Occurrence of reproductive disorders in pig herds with and without Chlamydia suis infection – statistical analysis of breeding parameters |
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| Authors: | Krzysztof Rypuła Aleksandra Kumala Katarzyna Płoneczka‐Janeczko Paweł Lis Ewa Karuga‐Kuźniewska Krzysztof Dudek Ireneusz Całkosiński Patrycja Kuźnik Paweł Chorbiński |
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| Affiliation: | 1. Division of Infectious Diseases of Animals and Veterinary Administration, Department of Epizootiology with Clinic of Birds and Exotic Animals, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Wroc?aw, Poland;2. Laboratory of Neurotoxicology and Environmental Diagnosis, Faculty of Health Science, Wroclaw Medical University, Wroc?aw, Poland;3. Faculty of Mechanical Engineering, Technical University of Wroc?aw, Wroc?aw, Poland |
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| Abstract: | Chlamydiae are frequently encountered Gram‐negative intracellular eubacteria that can cause clear manifestations or clinically asymptomatic disorders. C. suis and other chlamydia are primarily isolated in cases of reproductive disorders. This study was performed to estimate the impact of Chlamydia suis infection on reproduction in sows by analyzing reproduction rates and breeding parameters. The test was conducted on first generation (F1) pigs from Polish Landrace (PL) × Polish Large White (PLW). Sixty‐four herds were investigated and 500 vaginal swabs were collected. Isolation of DNA was carried out directly from the swabs. All samples were analyzed for Chlamydia suis by real‐time PCR with a locked nucleic acid (LNA)‐containing probe. To analyze the impact of chlamydia infection on reproductive parameters, evaluation questionnaires were used. Reproductive problems were found in 77.3% of the farms tested. The receiver operating characteristic curve indicated that in the farms with 10 up to 120 sows, there were higher reproductive problems with chlamydia infection than in smaller and bigger pig farms. The most common problems were estrus repetition, which was reported by 57.81% of the surveyed farms, and the birth of dead piglets, which was reported by 31.25% of the investigated pig farms. Abortions, which were reported by 28.12% of the surveyed farms, were the least common reproductive disorders. |
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| Keywords: | breeding parameters chlamydia Chlamydia suis reproduction swine |
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