FIG. 1.

(Left) RAPD-PCR banding patterns of isolates from milk of all cows involved in the first clinical mastitis outbreak. (Right) Examples of all RAPD-PCR banding patterns of isolates found in bedding and feces shortly after the first clinical mastitis outbreak. Isolates were identified as being K. pneumoniae based on phenotypic methods and rpoB sequencing, with the exception of six strains from bedding, which were identified as being Klebsiella spp. with phenotypic methods but were identified as being Raoultella spp. (star) based on rpoB sequencing (n = 5) or as being K. oxytoca (arrow) with all methods (n = 1). L, DNA ladder; M, isolates from milk; Be, isolates from bedding; F, isolates from feces; +, positive control lysate (ATCC 13883); −, negative control lysate; W, water.