Evaluating the field efficacy of Endoguard™  and Drontol™ in farm working dogs

Previous study of farm working dogs in the upper half of the North Island, New Zealand, found evidence of nematode and/or protozoan parasite infection in 68/170 dogs (40%)1: 38 dogs had only one species of parasite, 25 dogs had two species and five dogs had three or more species of parasites. Nineteen per cent (33/170) of dogs were infected with parasites from the Nematode phylum: Toxacara canis (9/170, 5%), hookworms (Uncinaria stenocephala or Ancylostoma caninum) (20/170, 12%), or Trichuris vulpis (8/170, 5%). Sarcocystis spp. sporocysts were present in the faeces of 35/170 (21%) dogs, Isospora canis or Isospora ohioensis were found in 9/170 (5%) dogs, Neospora caninum and Hammondia heydorni in 4/170 (2%) and Giardia spp. was found in 13/170 (8%) dogs. It is unclear if this result is unique to the region of New Zealand that the study was conducted. Nor do we know why the prevalence of nematode and/or protozoan infection is so high in farm working dogs. One possible explanation is that the owners of the dogs are not administering anthelmintic drugs regularly enough. While a second possible cause is that the commonly used anthelmintic drugs are not efficacious.

The aim of this study is to:
• Establish prevalence of nematode and/or protozoan parasite infection in working dogs on farms on farms in the South Island of New Zealand.
• Establish the field efficacy Endoguard™ and Drontol™, the most widely used anthelmintics drugs used to control internal parasites in working farm dogs.

Researchers : Lori Linney, Helen Williamson & Naomi Cogger

Contact Person : Naomi Cogger | N.Cogger@massey.ac.nz

Institution : Vetlife & Massey University Working Dog Centre

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