Article Text

Farm animal practice
Blitz therapy for the eradication of Streptococcus agalactiae infections in dairy cattle
  1. Peter Edmondson


Streptococcus agalactiae responds very well to intramammary antibiotic treatment. This allows a system of ‘blitz therapy’ to be used to eliminate these infections. Blitz therapy involves antibiotic intramammary treatment into all four quarters during lactation to eradicate S agalactiae infections. Its use became popular in herds with high cell counts that were caused by S agalactiae. Cell counts have fallen significantly since the early 1980s, and the prevalence of S agalactiae and the need to employ blitz therapy has reduced. This article discusses the epidemiology, diagnosis and therapeutic options where S agalactiae is the sole or predominant cause of a high cell count. It describes how to decide whether blitz therapy is appropriate, outlines the key principles of treatment and highlights how to avoid any subsequent problems.

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