Yellow dog tick

Definition

A common name for Haemaphysalis leachi, a hard-bodied (ixodid) tick that parasitizes domestic dogs and wild canids across sub-Saharan Africa and parts of the Middle East and Indian subcontinent. Adults attach preferentially to the ears, neck, and interdigital spaces, transmitting pathogens including Rickettsia conorii (boutonneuse fever) and potentially canine babesiosis agents. The common name refers to the yellowish coloration of engorged females and its primary host association.

Etymology

From the yellowish appearance of engorged specimens and its frequent occurrence on domestic dogs.

Example

In veterinary clinics in Nairobi, heavy infestations of yellow dog ticks on the pinnae of free-roaming dogs are often the first sign of tick-borne disease risk in a household.

Synonyms

• African dog tick
• dog tick

Related Terms

• Haemaphysalis
• hard tick
• ixodid
• tick-borne disease
• rickettsia
• canine babesiosis
• host specificity
• Vector

Usage Notes

Often used interchangeably with 'African dog tick,' though the latter emphasizes geographic origin. The simple 'dog tick' is ambiguous and also applies to Rhipicephalus sanguineus (brown dog tick) in many regions; precise identification requires examination of capitulum and festoon patterns. Not to be confused with 'yellow tick' vernaculars for other Haemaphysalis species.