36 Questions
Which of the following is a clinical importance of ectoparasites?
Parasites can cause secondary bacterial skin infections
Which of the following is an example of a zoonotic importance of ectoparasites?
All of the above
Which of the following is a common ectoparasite found on the skin surface of hosts?
Fleas
Which ectoparasite is known to cause pruritus and cutaneous myiasis?
Fleas
Which ectoparasite can transfer Dipylidium caninum to dogs?
Fleas
Which ectoparasite is a vector for leishmaniasis?
Sandflies
Which ectoparasite is responsible for sheep scab, causing significant economic loss?
Psoroptes ovis
What can ectoparasites indicate in a host?
Underlying immunocompromise
What is the clinical sign commonly associated with ectoparasites?
Pruritus
Which part of the body is most commonly affected by lesions in dogs with pruritus?
Caudal/dorsal part of the body
Which mite is associated with otitis in dogs and cats?
Otodectes
Which mite causes truncal scale and is zoonotic in rabbits?
Cheyletiella
Which mite is associated with sarcoptic mange in dogs?
Sarcoptes scabiei
Which animal is most likely to be affected by Trixacarus?
Guinea pig
Which parasite is a vector of bluetongue virus in cattle and sheep?
Midges
Which parasite causes 'sweet itch' in horses?
Culicoides spp
Which parasite is commonly found in chicken houses and only feeds at night?
Dermanyssus gallinae
When making a presumptive diagnosis, what factors should be considered?
All of the above
What should be done after drawing up a list of potential causal ectoparasites?
Undertake appropriate test
What should be recognized when undertaking appropriate tests?
The limitations of the tests
What is the purpose of recognizing limitations of tests?
To select the most appropriate test
What are the four cutaneous reaction patterns of cats?
Head and neck pruritus, Symmetrical alopecia, Eosinophilic granuloma complex (EGC), Miliary dermatitis
Which ectoparasite is associated with chorioptic mange in horses?
Chorioptes equi
Which ectoparasite causes truncal scale and is zoonotic in rabbits?
Cheyletiella (fur mite)
What is the vector of bluetongue virus in cattle and sheep?
Culicoides (midge)
What is the scientific name for the mite that causes otitis in dogs and cats?
Otodectes
What are the clinical importance of ectoparasites?
Directly impact welfare of host, predispose to/cause other disease in host, act as vectors of disease, clinical signs mimic other disease, act as pointers to other disease
What are the zoonotic importance of ectoparasites?
Fleas, Sarcoptes, Cheyletiella
What are the economic importance of ectoparasites?
Psoroptes ovis (sheep scab) – cause of significant economic loss (notifiable disease in Scotland)
What factors can influence the 'importance' of a parasitic condition?
Prevalence of disease and severity of effect
What are some common ectoparasites found on the skin surface of hosts?
Fleas
What are the diagnostic steps that should be undertaken for each potential causal ectoparasite?
The appropriate diagnostic steps for each potential causal ectoparasite should be undertaken based on knowledge of parasite biology.
What factors should be considered when making a presumptive diagnosis based on history, observation, and clinical presentation?
The species, age, husbandry, nature/distribution of lesions, and evidence of zoonosis should be considered when making a presumptive diagnosis.
Why is it important to recognize the limitations of tests?
Recognizing the limitations of tests is important because it helps to understand the potential shortcomings and reliability of the diagnostic methods being used.
What is the role of trial treatment in certain situations?
In certain situations, trial treatment can play a role in helping to confirm or rule out a parasitic infection.
If a parasite is not likely to be on the animal, where should it be looked for?
If a parasite is not likely to be on the animal, it should be looked for in the environment, such as in the case of poultry red mite (Dermanyssus).
Test your knowledge on the importance of ectoparasites in clinical settings. Learn about their impact on host welfare, ability to cause other diseases, and their role as disease vectors. Take the quiz now!
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