User:Bgolden/sandbox: Difference between revisions

Revision as of 19:30, 26 February 2024

Mastitis causing bacteria Contagious mastitis - primary source: udders of infected cows, - is spread to other cows primarily at milking time, - results in high bulk tank SCC. It is caused by: Streptococcus agalactiae (> 40% of all infections), Staphylococcus aureus (30 - 40% of all infections). The S. aureus bacterium is hardly eradicable, but can be reduced to less than 5% of the cows in a herd. The S. agalactiae is fully eradicable from a herd. Environmental mastitis Primary source: the environment of the cow. High rate of clinical mastitis (especially the lower resistant cows, e.g. Early lactation). Individual scc is not necessarily high (less than 300,000 is possible) . It is caused by: environmental steptococci (5 - 10% of all infections). Streptococcus uberis. Streptococcus bovis. Streptococcus dysgalactiae. Enterococcus faecium. Enterococcus faecalis. - Coliforms (< 1% of all infections): Escherichia coli. Klebsiella pneumoniae. Klebsiella oxytoca.

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+{| class="wikitable"
+|Mastitis causing bacteria
+Contagious mastitis
+# - primary source: udders of infected cows,
+# - is spread to other cows primarily at milking time,
+# - results in high bulk tank SCC.
+It is caused by:
+# Streptococcus agalactiae (> 40% of all infections),
+# Staphylococcus aureus (30 - 40% of all infections).
+The S. aureus bacterium is hardly eradicable, but can be reduced to less than 5% of the cows in a herd. The S. agalactiae is fully eradicable from a herd.
+Environmental mastitis
+# Primary source: the environment of the cow.
+# High rate of clinical mastitis (especially the lower resistant cows, e.g. Early lactation).
+# Individual scc is not necessarily high (less than 300,000 is possible) .
+It is caused by:
+# environmental steptococci (5 - 10% of all infections).
+* Streptococcus uberis.
+* Streptococcus bovis.
+* Streptococcus dysgalactiae.
+* Enterococcus faecium.
+* Enterococcus faecalis.
+# - Coliforms (< 1% of all infections):
+* Escherichia coli.
+* Klebsiella pneumoniae.
+* Klebsiella oxytoca.
+|}