Which of the following is a sucking louse species that infests dogs?

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Prepare for the VetSkill PCA Lab and Diagnostics Test with study tools like flashcards and multiple-choice questions. Each question comes with hints and explanations. Get exam-ready with us!

Multiple Choice

Which of the following is a sucking louse species that infests dogs?

Explanation:
Understanding the way lice feed helps distinguish which species infests dogs. Linognathus setosus is a sucking louse that specifically parasitizes dogs, feeding on the host’s blood through piercing mouthparts. This is what sets it apart from chewing lice, which bite and feed on skin debris rather than blood. For example, Trichodectes canis found on dogs is a chewing louse, not a sucking one. The other two names are human lice and do not infest dogs. So the dog-infesting sucking louse is Linognathus setosus.

Understanding the way lice feed helps distinguish which species infests dogs. Linognathus setosus is a sucking louse that specifically parasitizes dogs, feeding on the host’s blood through piercing mouthparts. This is what sets it apart from chewing lice, which bite and feed on skin debris rather than blood. For example, Trichodectes canis found on dogs is a chewing louse, not a sucking one. The other two names are human lice and do not infest dogs. So the dog-infesting sucking louse is Linognathus setosus.

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