| |
Contagious Mastitis |
Environmental Mastitis |
| Caused by |
Streptococcus agalactiae (S. agalactiae)
Staphylococcus aureus (S. aureus)
Streptococcus dysgalactiae (S. dysgalactiae) |
Coliforms: Escherichia coli
Klebsiellapneumonia
Klebsiellaoxytoca
Enterobacteraerogenes
Enviromentalstreptococci
S. uberis
S. bovis
S. disgalactiae
Enterococcus faeclum
Enterococcus faecalis |
| Primary source |
Udders of infected animals (from one quarter to another during milking). |
The environmentalof the cow |
| Problem indicators |
Somatic cell count > 300,000 cells /ml in bulk tanks.
DHIA SCC score > 3.2
Animal DHIA SCC score ≥ 5 in 15% of them
Recurrent episodes of mastitis infection in same animals
Presence of S. agalactiae or S. aureus in bacterial cultures |
High rate of clinical mastitis especially during lactation or hot weather, where SCC score could be < 300,000 |
| Control recommendations |
Develop program to prevent the spread of bacteria at milking time
Eliminate existing infections by treating infected animals at drying off and eliminating chronic cases among them. |
Reduce the number ofbacteria to which the teat end is exposed
Improve cleanliness of cow surroundings, especially in late dry period and calving
Improve prepping procedures to ensure clean, dry teats are being milked |
| |
Eradicate S. agalactiae from herd
Reduce S. aureus infection to <5% in herd |
Reduce clinical mastitis to < 3%of milking animals/month |
