10.22376/ijpbs.2019.10.1.p1-12 Volume 2 Issue 3 2011 (July - September) An experimental model was developed in rabbits to study bovine mastitis. Six lactating rabbits for each isolate were used to induce mastitis by using highly prevalent lessThan i greaterThan E.coli lessThan /i greaterThan O9 and O147 isolates from bovine mastitis cases that possessed three different virulent genes. In the study, 10 lessThan sup greaterThan 4 lessThan /sup greaterThan , 10 lessThan sup greaterThan 5 lessThan /sup greaterThan , 10 lessThan sup greaterThan 6 lessThan /sup greaterThan and 10 lessThan sup greaterThan 7 lessThan /sup greaterThan cfu/ml of lessThan i greaterThan E.coli lessThan /i greaterThan bacterial suspensions were inoculated in to each pair of teats via the base of the teat and to the first pair, 1 ml of PBS was administered. Gross lesions were recorded for 6 days post inoculation. Milk samples were collected from zero days, up to 144 hrs. Mastitis was induced as indicated by an increase in SCC, positivity with CMT and increase in total viable bacterial counts in milk. The macroscopic lesions were very well appreciated in all the infected quarters at 48 hrs post infection. The results in the present study clearly showed that both the serotypes induced mastitis in rabbits. Kavitha G, S Isloor, D Rathnamma, Y B Rajeshwari, C S Nagaraja And S Sadish Rabbits, mastitis, E.coli serotypes O9 and O147, SCC, CMT. 266-276