Browsing by Author "Dhuri, R. B."

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    Bacteriological Quality of Milk at Different Levels of Collection in Goa
    (Indian Association of Veterinary Public Health Specialists, 2011) D’Costa, Dilecta; Bhosle, S. N.; Dhuri, R. B.; Barbuddhe, S. B.
    The bacteriological quality of milk at different levels of collection was studied. Samples were collected in sterile containers at quarterly intervals. The samples were analysed for total vibal count, methylene blue reduction test (MBRT) and California mastitis test (CMT). Subclinical mastitis was found in 23.8 percent of the animals. The average methylene blue reduction time decreased from the farm to the processing unit. The average counts were 2.67x104, 1.59x104, 9.23x105 and 2.35x106 cfu/ml at farmers' field, milking utensils, collection centers and receiving dock (processing point), respectively. The milking methods, milk containers and time interval from the collection at the udder level to the receiving dock played a major role in the deterioration of the milk quality along with the climatic conditions prevalent in a particular season.
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    Prevalence, Serogroups, Shiga-toxin Genes and Pulsed Field Gel Electrophoresis Analyses of Escherichia coli Isolated from Bovine Milk
    (Springer Nature, 2013) D’Costa, Dilecta; Bhosle, Saroj N.; Dhuri, R. B.; Doijad, S. P.; Poharkar, K. V.; Kalorey, D. R.; Barbuddhe, S. B.
    Shiga toxin-producing Escherichia coli (STEC) including non-O157 strains have been linked to outbreaks and sporadic cases of illness worldwide. A total of 647 milk samples were collected at different levels of collection and processing (udder, milking utensils, milk collection centres and receiving dock) within West Coast region of India. The milk samples were screened for the presence of E. coli and further tested for the Shiga-toxin (stx) genes by PCR. The isolates were characterized for their serogroups and XbaI digestion patterns of total DNA separated by pulsed-field gel electrophoresis (PFGE). A total of 77 (11.90 %) isolates were confirmed as having E. coli. The serogroups reported were O4, O60, O112, O56, O159, O120, O2, O83, O88, O95, O141, O21, O25, O80, O140, O97, O24, O166, O146, O51, O169, O147, O103, O18, O100, O15, O69, O43, O7, O3, O45, O124, O110, O84, and O114. Out of the 77 E. coli isolates, 25 (32.46 %) could be classified as Shiga-toxigenic based on PCR results. Of these 11, 3 and 11 isolates were positive for stx1, stx2, and both stx1 and stx2, respectively. PFGE profiles indicated genetic diversity of E. coli strains. Much variation was observed among isolates recovered at different levels of collection. Further research is needed to uncover unique characteristics and resistance of non-O157 STEC strains.