Haemonchus contortus: then and now

Haemonchus contortus is the nematode “nemesis” of small ruminant production systems in tropical and subtropical regions of the world. Its reputation derives from a combination of high fecundity and a short generational interval that provides an enviable developmental plasticity for adaptation or resistance to control measures. A recent review in the International Journal for Parasitology critically examines the historical and current literature on the host–parasite–environment interaction for H. contortus, particularly in sheep, to highlight changes in parasite distribution and ecology on pasture, changes to the seasonal inhibition of fourth stage larvae and the most appropriate models to id

Registration Open For All Worms All Day

Registration is now open for the 2018 Delmarva Small Ruminant Conference: ALL WORMS ALL DAY. The link for registration is https://allwormsallday.eventbrite.com. ALL WORMS ALL DAY is a repeat of the same conference held last year at Delaware State University. The 2018 conference will be held Saturday, December 8 at the University of Maryland's Western Maryland Research & Education Center in Keedysville. All topics will pertain to internal parasite control in small ruminants. All speakers are members of the American Consortium for Small Ruminant Parasite Control (ACSRPC): Susan Schoenian, University of Maryland; Dr. Nelson Escobar, University of Maryland Eastern Shore; Dr. Kwame Matthews,

Can we replace resistant worms with susceptible worms?

What if you could go back in time before the development of drench resistance and implement sustainable parasite control strategies to help slow the development of resistance? Would you try a new strategy of worm control to reclaim your drenches and have effective chemicals to control internal parasites? Read WormBoss Article

ACSRPC Members Honored

Two members of the American Consortium for Small Ruminant Parasite Control were recently honored. Sue Howell won the University of Georgia College of Veterinary Medicine Research Technician award for this past year. This award is given to one person each year in May at the annual employee awards luncheon. She received a monetary gift in addition to a plaque. She was nominated by Dr. Ray Kaplan. Dr. Ray Kaplan won the 2018 AAVP-Boehringer Ingelheim Distinguished Parasitology Award. The American Association of Veterinary Parasitologists (AAVP) awarded Dr. Kaplan his plaque at its 63rd Annual Meeting in Denver, Colorado on July 14, 2018. Dr. Kaplan presented a talk entitled “My Parasitological

Live Weight as a Basis for TST

Targeted selective treatment (TST) has been proposed as a sustainable method of gastrointestinal nematode control that reduces the number of anthelmintic treatments administered, thereby preserving a susceptible nematode population in refugia. On three farms in Ireland, weaned lambs were weighed and separated into three weight classes (light, medium, and heavy) to see if heavy lambs were more resilient than light lambs, if left untreated. Within the heavy (n = 225) and light (n = 218) weight classes, lambs were randomly allocated to two treatments; anthelmintic treatment or no anthelmintic treatment. All lambs in the medium weight class were treated. Animal performance and parasitological pa

USDA Selling Resistant Katahdins

The Dale Bumpers Small Farms Research Center in Booneville, Arkansas, is having a Katahdin Sheep Sale on August 23. The sheep are available for viewing on August 20-22, 8 a.m. to 2 p.m. All sheep sell with breeding values (EBVs) provided by the National Sheep Improvement Program (NSIP). Some of the station's sheep are in the top 1% (of the Katahdin breed) for parasite resistance. For more information, go to https://www.ars.usda.gov/southeast-area/booneville-ar/dale-bumpers-small-farms-research-center/docs/local-news/.

Cost of Subclinical Parasitism in Ewes

Almost 10 years ago, a study was published in the Small Ruminant Research Journal, documenting the cost of subclinical parasitism in grazing ewes (in New Zealand). Five hundred ewes from a mixed aged flock of 3000 crossbred Romney ewes were selected for the experiment. Of these, 250 ewes were given controlled released capsules of either albendazole or ivermectin. The other 250 ewes served as untreated controls. The initial worm burdens in January were low (mean: 34 epg), but in the untreated ewes rose to high levels before mating in March and reached a mean of 1416 epg. Haemonchus was identified as the principal parasitic genus. In June, epg were reduced to a mean of 526 epg, with Trichostro

Continuing Education for Vets/Vet Techs

The State Board of Veterinary Medical Examiners (in Maryland) has approved five (5) continuing education (CE) credits for veterinarians and registered veterinary technicians (RVTs) attending the Delmarva Small Ruminant Conference: All Worms All Day, December 8, 2018 in Keedysville, Maryland. The 2018 Small Ruminant Conference: All Worms All Day is a repeat of the same conference held last December at Delaware State University. All of the topics to be covered will pertain to internal parasites in small ruminants. All of the scheduled speakers are members of the American Consortium for Small Ruminant Parasite Control (ACSRPC): Dr. E. Nelson Escobar, University of Maryland Eastern Shore; Dr.

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