“Most flocks have some level of parasitic infection but symptoms from these infections really tend to show up during high rainfall as the amount of parasites build up and cause health issues,” he said. Redden said internal parasites such as roundworms and coccidia can occur in sheep during wet periods. Reid Redden, AgriLife Extension state sheep and goat specialist at San Angelo. The recent rains are also likely to create some parasite problems for sheep flocks, said Dr. He said spring-born nursing calves are the biggest benefactors of anthelmintic treatment this time of year. “And tick bites can cause swelling, redness and localized infections.” “Wet weather also creates prime conditions for tick infestations and ticks are the primary vector for anaplasmosis, which causes severe anemia and can kill livestock,” Machen said. (Texas A&M AgriLife Extension Service photo)
Ticks are among the external parasites that may be found in greater number on cattle and other livestock as a result of recent rains. The pour-on application has the further advantage of providing some external control of horn flies and face flies as well as ticks, he said. “Generally, I’ve found that for ease of application most producers prefer the topical or pour-on application.” “The anthelmintic, or treatment, for this parasite can be used orally, topically or through injection,” Machen said. Affected animals lose weight and in severe cases may die of overwhelming clinical ostertagiasis, a disease characterized by severe diarrhea, edema and serious weight loss. Machen said with the recent wet weather the biggest challenge for cattle is the brown stomach worm. Rick Machen, AgriLife Extension livestock specialist based in Uvalde. “Wet weather creates conditions favorable for parasites to infect animals on pasture,” said Dr. By: Paul Schattenberg, 21, Rick Machen, 83, Reid Redden, 32, Wicksten, 97, Mike Merchant, 97, - Excessive rains in many parts of the state have Texas A&M AgriLife Extension Service experts concerned about the possibility of increased parasite and pest activity with livestock.
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