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Asian Journal of Animal and Veterinary Advances
  Year: 2019 | Volume: 14 | Issue: 1 | Page No.: 1-6
DOI: 10.3923/ajava.2019.1.6
 
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Leptospira Abortion in Dairy Cows: Clinical, Hematological and Serum Biochemical Alterations
Zuhair Bani Ismail

Abstract:
Background and Objectives: Leptospirosis is an important cause of reproductive losses in dairy cows. This study aimed to describe the history, clinical presentation, hematological and serum biochemical changes in Leptospira serovars Hardjo and Pomona seropositive dairy cows with recent history of abortion. Materials and Methods: A total of 40 aborted and 20 apparently healthy (control) cows were used in the study. In all aborted cows, abortion had occurred within 14 days prior to the study while control cows had no history of abortion within the previous 12 months. All cows were subjected to a complete physical examination including rectal temperature, heart rate, respiration rate, mucous membrane color, capillary refill time and rumen motility. Whole blood samples were collected from all cows for hematology and serum biochemical analysis using routine laboratory methods. The seropositivity of the cows against Leptospira serovars Hardjo and Pomona was determined using IgM-specific ELISA kits according to the manufacturers recommendations. According to the ELISA test results, cows were divided into 3 groups; Group 1 included cows seropositive to Leptospira serovar Hardjo (n = 20), Group 2 included cows seropositive to Leptospira serovar Pomona (n = 20) and Group 3 (n = 20) included control cows (non-aborted and Leptospira seronegative). Results: None of the farmers of the aborted cows have reported to notice any abnormal clinical signs before, during or after the incident of abortion. There were no statistically significant differences in any of the physical examination parameters between the 3 groups. Leptospira seropositive cows had statistically significant (p<0.05) decrease in RBC, Hb and PCV and a significant (p<0.05) increase in MCV values compared to control cows. In seropositive cows, there were statistically significant (p<0.05) increase in AST, ALP and fibrinogen values compared to control cows. No other significant differences were observed in any of the parameters in the study. Conclusion: Results of this study provide some indicators of the general health status of aborted dairy cows with previous exposure to Leptospira serovars hardjo and pomona.
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How to cite this article:

Zuhair Bani Ismail , 2019. Leptospira Abortion in Dairy Cows: Clinical, Hematological and Serum Biochemical Alterations. Asian Journal of Animal and Veterinary Advances, 14: 1-6.

DOI: 10.3923/ajava.2019.1.6

URL: https://scialert.net/abstract/?doi=ajava.2019.1.6

 
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