Monday, October 26, 2015

Predominantly Haemonchus Contortus

The fecal egg count of the pooled sample collected on October 1 (the last day of the test) was 5,025 epg. This was similar to the average of the individual fecal egg counts, especially if the unusually high egg count (of 59,350) is removed from the data set.

The October 1 fecal sample was composted of 75 percent Haemonchus, 16% Trichostrongylus/Teladorsagia mix, and 9% others. Haemonchus, better known as the barber pole worm, is a blood-sucking parasite that causes anemia and bottle jaw.  It can also cause sudden death. Chronic haemonchosis can cause loss of weight and body condition.

Trichostrongylus and Teladorsagia are often called "scour" or "bankrupt" worms. Scour worms --  because they cause ill thrift, weight loss, and scours (diarrhea). Bankrupt worms -- because they cause productivity losses, which generally affects the bottom line.

Click on graph to view in a new, larger window.

Most small ruminants have mixed parasitic infections. Strongyle-type (roundworm) eggs must be hatched in order to identify the species from the larvae. High fecal egg counts are usually indicative of a significant barber pole worm infection, as the female barber pole worm is a very prolific egg layer compared to the female worms of other species.