Chapter 9: The Filariae Flashcards
In which of the following may biopsy material be valuable in diagnosis of:
Onchocerciasis (skin snip)
In what way all microfilariae notes is similar
The basic life cycle
Diagnosis of infection with Wuchereria bancrofti is best accomplished by
Examination of stained peripheral blood taken during the night
Which of the following can be used in the differentiation and identification of Brugia malayi?
Presence of two distinct terminal nuclei in the tail
What is the ideal time period to collect blood samples for examination for the presence of the microfilariae of Brugia malayi
10:00 p.m. to 4:00 a.m.
A small threadlike worm is observed under the conjuctiva of the eye. What organism and form is most likely found?
Loa loa adult
What type of periodicity does Loa loa exhibit?
Diurnal
Skin snips are the specimen of choice for diagnosis of infection with:
Onchocerca volvulus
How are the microfilariae of Mansonella ozzardi differentiated from those of Ochocerca volvulus?
Location of the microfilariae
If a physician suspects an individual has the potential for infection with Mansonella perstans, what specimen type would you suggest for recovery of the organism?
Blood
What type of periodicity does Mansonella perstans exhibit?
Nonperiodic
Which of the following filarial nematodes is known as the blinding filaria?
Onchocerca volvulus
The microfilariae of Brugia malayi are recognized by the:
Presence of a sheath and two distinct terminal nuclei in the tail
Which of the filarial nematodes utilizes the mosquito as its vector?
Wuchereria bancrofti
Swelling of the lower extremities due to obstruction of the lymphatic system by adult filarial matodes is known as:
Elephantiasis
