Serological and nested PCR survey to determine the occurrence of chlamydia infections in the Polish cattle population
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Laboratory of Serological Diagnosis /Department of Cattle and Sheep Diseases, National Veterinary Research Institute, Puławy, Poland
Department of Allergy and Environmental Health, Institute of Rural Health, Lublin, Poland
Monika Szymańska-Czerwińska   

Laboratory of Serological Diagnosis /Department of Cattle and Sheep Diseases, National Veterinary Research Institute, Puławy, Poland
Ann Agric Environ Med. 2013;20(4):682–686
Chlamydia spp. is an obligate intracellular agent that causes chlamydiosis in animals and humans. The aim of the presented study was to investigate the prevalence of Chlamydia infection in the Polish cattle population, both asymptomatic and having reproductive disorders. The study was performed on 4,475 serum samples collected from 16 Polish provinces at the turn of 2009–2011. The samples (3,419 from asymptomatic cattle and 1,056 from cattle with reproductive disorders) were tested by complement fixation test (CFT). Moreover, 160 and 201 samples of biological materials from both groups of cattle, respectively, were tested by nested PCR. The results obtained for two tested groups were compared by χ2 (ch-squared) test, both individually for each region (province), and generally for the whole country. The CFT results showed that the seroprevalence of Chlamydia spp. infections in the asymptomatic cattle population was 4.15%, while in the cattle with reproductive disorders – 7.20%. There was a significant statistical difference between compared groups for whole country, but there were no significant differences for individual provinces. The results of PCR showed that Chlamydia spp. was present in both asymptomatic cattle and cattle having reproductive disorders. The nested PCR study confirmed the presence of Chlamydia abortus and Chlamydia suis in the tested samples. The presented study indicates that infections with Chlamydia spp. are present among Polish cattle, but the percentage of infected animals is not high.
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