Laurence Villard-Marjolet, D. Gauthier, Françoise Maurin, E. Borges, Y. Richard, et al.. Serotypes A1 and A2 of Mannheimia haemolytica are susceptible to genotypic, capsular and phenotypic variations in contrast to T3 and T4 serotypes of Bibersteinia (Pasteurella) trehalosi.
FEMS Microbiology Letters, Wiley-Blackwell, 2008, 280 (1), pp.42-49.
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