Laboratory transmission of dog heartworm (Dirofilaria immitis) by three species of mosquitoes (diptera: culicidae) from eastern Maryland, USA

E. Roberts, M. April, M. Trpis

Research output: Contribution to journalArticlepeer-review

Abstract

Three species of mosquitoes from eastern Maryland, USA, were tested for their ability to transmit Dirofilaria immitis (Leidy) from heartworm-positive dogs to recipient dogs with no prior exposure. Two recipient dogs and 1 uninfected control dog were allotted to each test species. Experimental mosquitoes were initially infected through feeding on a microfilaremic donor. Infection levels and larval development were observed by dissection. After a 3-wk incubation period, the mosquitoes were allowed to feed on recipient dogs. Both recipient and control dogs were tested for microfilariae during the months after exposure. Following a 6- to 10-month period, dogs were euthanized and examined for adult worms. Patent infections were produced in 4 dogs exposed to the bites of Aedes sollicitans or Aedes triseriatus, with average infection levels of 12.5 and 5.8 worms per dog, respectively. Patent infection was produced in 1 of the dogs exposed to the bites of Anopheles punctipennis. All controls were negative. All 3 test species were found to be capable of transmitting D. immitis to dogs. Under laboratory conditions, Ae. sollicitans and Ae. triseriatus were more successful at transmission than An. punctipennis.

Original languageEnglish (US)
Pages (from-to)415-420
Number of pages6
JournalJournal of medical entomology
Volume22
Issue number4
DOIs
StatePublished - Jan 1 1985

ASJC Scopus subject areas

  • Parasitology
  • veterinary(all)
  • Insect Science
  • Infectious Diseases

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