Case report: characterization of a persistent, treatment-resistant, novel Staphylococcus aureus infection causing chronic mastitis in a Holstein dairy cow.

ABSTRACT:

Background

Mastitis is the most common health concern plaguing the modern dairy cow and costs dairy producers estimates of two billion dollars annually. Staphylococcus aureus infections are prevalent, displaying varied disease presentation and markedly low cure rates. Neutrophils are considered the first line of defense against mastitis causing bacteria and are frequently targeted in the development of treatment and prevention technologies. We describe a case of naturally occurring, chronic mastitis in a Holstein cow (1428), caused by a novel strain of S. aureus that was not able to be cleared by antibiotic treatment.

Case presentation

The infection was identified in a single quarter, 2 months into the cow's first lactation. The infection persisted for the following 20 month

SUBMITTER: Putz EJ 

PROVIDER: S-EPMC7491080 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature