Heterodoxus spp

From Cow
Adult Heterodoxus spp

Heterodoxus spp (dog chewing louse) are a tropical and subtropical parasitic louse which rarely affects cattle except in rural areas where they are kept with dogs and cats.

Heterodoxus is found throughout the world but is generally restricted to areas with domestic livestock.

Alopecia, pruritus and 'worry' are common features of this parasite.

Species which are pathogenic to cattle include:

  • Heterodoxus spiniger[1]

These parasites can be effectively eradicated with modern insecticides such as fipronil and ivermectin[2].


  1. Changbunjong T et al (2009) A survey of ectoparasitic arthropods on domestic animals in Tak Province, Thailand. Southeast Asian J Trop Med Public Health 40(3):435-442
  2. White WH et al (2007) Therapeutic and persistent efficacy of spinosad applied as a pour-on or a topical spray against natural infestations of chewing and sucking lice on cattle. Vet Parasitol 143(3-4):329-336