Vet labs record changes in mastitis type
Mastitis culture results reported from Regional Veterinary Laboratories in the first quarter of 2017 have revealed higher findings of a less common strain of mastitis bacteria.
According to official Department of Agriculture figures, a higher relative frequency of Streptococcus uberis isolations compared to Staphylococcus aureus was found.
It said this is an ‘interesting development’ considering that Strep. uberis has become the leading cause of clinical and subclinical mastitis in New Zealand dairy herds over the last 20 years.
While, it warned that these results represent only three months of data, it also said that it is notable that increasing frequency of detection of this environmental pathogen in other countries among clinical cases has been associated with higher stocking rates and widespread use of calving and feed pads; higher yielding cows and those fed concentrate-based transition diets are also believed to be at increased risk.
It is possible that this finding is reflective of some of the current changes in the Irish dairy sector, it said.
The Department report said January was drier than normal this year which, when combined with a marginally warmer average temperature, made for favourable conditions on ‘out-wintered’ livestock.
Overall carcase submission rates were lower (11.6%) than Q1 2016 which was primarily attributable to a decrease in sheep carcase submissions.