Page 218 - The Veterinary Laboratory and Field Manual 3rd Edition

Parasitology 187

Figure 3.39 Morphological characteristics used to identify ticks. The identification of ticks requires careful
examination, usually of adult males, under a dissecting microscope. Fully engorged females are difficult
to examine due to the distortion of their anatomical features. On the dorsal (upper) surface the shape and
size of the scutum (sc), the colour of the body and legs and the type of mouth parts may also assist in the
identification to genus level. Identification to species level requires experience but may be achieved using
detailed keys. Adult males should be placed on their back and the ventral (under) side examined for the
shape and size of the anal groove (ag), spiracles (s) and the coxae (c).

development on the same host (for example, phological features that need to be identified
Rhipicephalus [Boophilus] annulatus) (Figure 3.42). using a dissecting microscope with a good light
source. Identification to genus level may be done
using basic classification guidelines but identi-
tick identification fication to species level may need referral to a
specialist centre. It is important to identify the
The identification of ticks takes time and type of tick present as this allows more targeted
experience. Figure 3.39 outlines the main mor- and effective control measures to be developed.

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