Streptococcus uberis

Streptococcus uberis has become one of the most significant pathogens causing mastitis. This microorganism survives successfully in the dairy farm environment and the cow body, including the bovine mammary gland. This characteristic makes the management of the pathogen difficult since it requires not only the prevention and treatment of intramammary infections (IMI) but also the control of areas in the environment where the pathogen is highly prevalent.

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Text and pictures: Raul Almeida

Streptococcus uberis on blood agar plate.

In the following sections of this article, virulence factors, pathogenesis strategies, and epidemiological characteristics that enable Strep. uberis to adapt and survive in such diverse environments will be presented and discussed; and concludes with concepts on the prevention and control of this mastitis pathogen.

The microorganism

Although Ayers and Mudge (1922), may have retrospectively isolated and described a Streptococcus species

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