Abstract
The subclinical mastitis (SCM) causes great economical loss in dairy farms due to reduction in milk production. The objectives of the study were to know the prevalence of subclinical mastitis in lactating cows using Draminski mastitis detector and to evaluate the efficacy of intramammary infusion against SCM in lactating dairy cows. The study was conducted in crossbred dairy cattle in peri-urban dairy production system within seven kilometers around the artificial insemination Centre, Bangladesh Agricultural University, Mymensingh during April, 2011 to May, 2012. The overall prevalence of SCM in lactating cows was 55.1%. The highest prevalence of SCM was 84.4% in more than 7 years old cows. The prevalence of SCM was significantly (p<0.001) increasing with the advancement of the age. The prevalence of SCM was significantly (p<0.05) higher (73.7%) in cows producing more than 15 liters of milk. Cows with 75% Holstein Friesian genotype experienced more SCM (63.0%) than other genotypes. An increased prevalence of SCM with increased number of parity in cows was also observed. The prevalence of SCM was significantly (p<0.001) higher in cows with parity more than five. The highest prevalence of SCM was recorded in left hind quarter (32.3%) but the difference was not significant (p>0.05) statistically. The efficacy of Neomastipra-JR5® as intra mammary infusion against SCM in lactating cows was 78.2%. Draminski mastitis detector could be a potential candidate for the diagnosis of SCM in dairy animals in Bangladesh context. But before introducing this machine in the field it should be validated either by comparing with a gold standard test like somatic cell counter or by using latent class evaluation in a multi-test approach. DOI: http://dx.doi.org/10.3329/bjvm.v11i1.17731 Bangl. J. Vet. Med. (2013). 11 (1): 37-41
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