[1] Univ Sao Paulo, Inst Biomed Sci, Dept Microbiol, Sao Paulo, Brazil
[2] Purdue Univ, Coll Vet Med, Dept Comparat Pathobiol, W Lafayette, IN 47907 USA
[3] Agrifood & Biosci Inst, Vet Sci Div, Bacteriol Branch, Belfast, North Ireland
[4] AgResearch Ltd, Palmerston North, New Zealand