Prevalence and identification of subclinical mastitis in cows at BLRI Regional Station, Sirajganj, Bangladesh

Abstract

Objective:The study was conducted to assess the prevalence of subclinical mastitis in dairy cows at Baghabari milk shed area of Sirajganj and Pabna districts in Bangladesh. Materials and methods: A total of 300 milk samples were collected from crossbred dairy cows, and the milk samples were subjected for using California Mastitis Test (CMT). Besides, data related to farm management were taken from 60 farmers through direct interviews. The CMT was compared with White Slide Test (WST) and Surf Field Mastitis Test (SFMT). The samples showing strong positive reaction to mastitis by CMT were used for the isolation of associated bacteria using conventional bacteriological examinations and biochemical properties. The isolated bacteria were subjected for antibiogram studies by disc diffusion method. Results: Out of 300 samples, 153 (51%) revealed positive reactions denoting that the cows were suffering from subclinical mastitis. Of the 153 samples, 39(13%) were trace-positive, 56(18.56%) were weak-positive, 33(11%) were distinct-positive, and the rest 25(8.3%) samples were strongly positive. In comparison economically among CMT, WST and SFMT, SFMT was found to be the cheapest and easiest. In this study, the cows were mostly infected with mixed infection with Staphylococcus spp., Streptococcus spp., Escherichia coli, Salmonella spp., and some cows had single bacterial infection. It was observed that most of the microorganisms were sensitive to Gentamycin, Amoxicillin and Ceftriaxone, and were resistant to Penicillin, Ciprofloxacin and Colistin sulphate. Conclusion: Overall prevalence of subclinical mastitis in the crossbred dairy cows at Sirajganj and Pabna district is 51%. It indicates that subclinical mastitis is a major threat for dairy industry in the studied areas. Early detection and appropriate preventive measures are suggestive to successful control of the disease.

Detection of Subclinical Mastitis in Milk of Dairy Cows in Sohag City, Egypt

“…As shown in Tables 1 & 3, it was found that the rate of SCM among milk samples by WST revealed an incidence rate of 49% at the quarter level. Nearly similar results of SCM by +ve WST were obtained by Shahid et al (2011); Kabir et al (2017); while lower incidences were obtained by Iqbal et al (2004); Zahid (2004); Barua et al (2014).…”

Prevalence of Sub-clinical Mastitis and Associated Risk Factors at Cow Level in Dairy Farms in Southwestern Part of Bangladesh

“…However, the prevalence of SCM at the individual cow level was 67.9%, which has consistent and discrepancies with the study reporting prevalence in Bangladesh and around the globe. The estimated prevalence is higher than the reported prevalence of SCM in different district of Bangladesh including Sirajganj, Rajshahi, Chattogram and Barisal [8,15,17,31]again the reported SCM prevalence is lower than the prevalence of SCM calculated in Nigeria (85.3%) [32], Uganda (86.2%) [33] and Vietnam (88.6%) [34]. However, the estimated SCM prevalence is higher than the study conducted inKenya [35], Ethiopia [36], New South Wales of Australia [37], Rwanda [19]and Uruguay [38].…”

Development and validation of BLRI Mastitis Test Kit at Bangladesh Livestock Research Institute Regional Station, Sirajganj

“…On the other hand, BMT could be used as an inexpensive test to assess the SCM of animals, as reported by Sargeant et al [22] on CMT. In another study, we found the CMT as an effective test kit for assessing SCM [13]. However, Sarker et al [23] and Sumon et al [17] found only 20.2% and 25% prevalence of SCM in dairy cows, respectively.…”