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Jordan University of Science and Technology (JUST) 2001

Some studies on infectious causes of cattle infertility in Jordan

Shaker Nebih Mustafa Al Dohni

Titre : Some studies on infectious causes of cattle infertility in Jordan

Auteur : Shaker Nebih Mustafa Al Dohni

Université de soutenance : Jordan University of Science and Technology (JUST)

Grade : Master of Science (MS) 2001

Résumé
This study was conducted to investigate the main infectious causes of infertility in cattle in Jordan. Fifty-five cows and fifty bulls were included in this study to investigate bacterial causes of endometritis and prevalence of trichomoniosis, respectively. Bacterial investigations were made on 55 dairy cows with signs of endometritis and vaginal discharge. Samples of uterine fluid were collected by tarnscervical aspiration using a sterile artificial insemination pipette and were cultured aerobically and anaerobiclly. Actinomyces pyogenes was the most common bacterial isolate representing 62% of the total samples. E. coli, Streptococci spp, Staphylococci spp and Proteus spp were frequently isolated, but Camplyobacter fetus was not isolated from any sample. A. pyogenes was resistant to antibiotics like tetracycline and streptomycin, but demonstrated in vitro sensitive to penicillins. The prevalence of trichomoniosis was investigated in fifty bulls distributed in 24 farms in Jordan. Dry pipette methods was used to collect preputial samples three times at one-week intervals. Smegma was cultured in InPouch TF tests kit for 7 days. Non of the preputial samples were cultured positive for Tritrichomonas foetus. It was concluded that A. pyogenes was the most important cause of infectious infertility in cattle. Trichomoniosis role in reproductive loss is almost nill as trichomoniosis was not found in this study. However, extremely low prevalence rates of trichomoniosis could not be excluded. Further studies using larger numbers of older bulls will confirm our results with certainty.

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