A comparison of microbiologic, macroscopic (stretching and transparency) and microscopic (fernization and crystals structure) characteristics of the estrous discharge in normal and repeat breeder cows
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Research/Original Article (دارای رتبه معتبر)
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In this article; 42 repeated breeders (test group), and 18 healthy (control group) and on heat Holstein cows were prepared in a farm of Khorasan-Razavi province. Their blood samples were obtained from the coccygeal vein and the isolated serum samples were frozen and sent to a laboratory, together with the heat discharge samples. In the laboratory; estradiol concentrations of serum samples were determined with RIA technique, and microbiology and the other discharge characteristics were determined grossly (transparency and stretching levels), or with a light microscope (fernization and crystals regularity). Results showed that; the mean of stretching levels (cm) (3.15±0.2, 3.25±0.3, 3.1±0.4, 3.3±0.3, P=0.9), the median of simple fernization (2.5, 3, 2, 3, P=0.3), the median of fernization levels evaluated with Photoshop software (3, 3, 4, 4, P=0.1), the crystals regularity (2, 2, 2, 2, P=.85), the median of levels of transparency (2, 1.5, 2, 2, P=0.06), the mean of concentrations of estradiol-17-β (pg/ml) (8±2.4, 4.7±1.7, 4±1.5, 5.3±0.3, P=0.7) were determined in non-pregnant (N=34) and pregnant (N=8) repeat breeder, and non-pregnant (N=10) and pregnant (N=8) normal cows, respectively. Spearman correlation test showed only a significant correlation between fernization levels evaluated with Photoshop software and different (test and control) animal groups (r= - 0.3, p=0.017). So that the third degree of fernization (equivalent to 40-60% of fernization) was considered the best degree, and the lower or the higher than it considered as unsuitable degrees. There was no significant correlation between the result of microbiologic findings and fernization, transparency, stretching levels and crystals regularity (P>0.05). However, E. coli, Klepsiella, Trueperella pyogenes and beta-hemolytic Staphylococci were significantly more isolated from repeat breeder cows (P=0.00). It was concluded that only the middle fernization level evaluated with Photoshop software was

Language:
Persian
Published:
Journal of Veterinary Microbiology, Volume:15 Issue: 1, 2019
Pages:
81 to 96
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