Microbiology Question: Download Questions PDF
An ophthalmologist from Cameroon, Africa describes the microfilaria seen in the eye of patients with Onchocerciasis. He states that he treats only after finding 30+ microfilaria because of the toxicity of Diethyl-Carbamazine that was used for treatment. Now with a less toxic agent, (Ivermectin) a major attempt is being made to eradicate Onchocerca volvulus. Which statement is false regarding Onchocerca volvulus?
Answer:
* A. It is transmitted by the Simulian Black fly that reproduces in rapidly moving water
* B. Itching of the skin is a prominent feature of this disease
* C. The adults live in a nodule on the skin with the female producing large numbers of microfilaria that migrate under the skin
* D. Diagnosis can sometimes be made by finding the microfilaria in a skin snip or skin biopsy
* E. The microfilaria mates in the human skin and develop into the adult parasite
Correct Answer: E
* B. Itching of the skin is a prominent feature of this disease
* C. The adults live in a nodule on the skin with the female producing large numbers of microfilaria that migrate under the skin
* D. Diagnosis can sometimes be made by finding the microfilaria in a skin snip or skin biopsy
* E. The microfilaria mates in the human skin and develop into the adult parasite
Correct Answer: E
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