Exam & Evaluation (West Nile Virus)
Questions: Please respond to following statements.
WNV has spread across the United States, Canada, and northern Mexico, infecting over 16,000 people.
IgM may not be detectable by IgM antibody-capture enzyme-linked immunosorbent assay (WNV IgM ELISA) during the first week of illness.
The mosquito is the primary vector and birds are the primary reservoir in the normal WNV transmission cycle.
WNV is an arbovirus, short for arthropod borne virus
Vector transmission occurs primarily between the months of May and November in North America.
A WNV equine vaccine is commercially available .
Since WNV-NAT testing was instituted to check all blood in July, 2004, the blood supply has been completely safe from WNV.
Screening organs for WNV is always be done prior to transplantation.
Known WNV-infected organs may be used in some conditions.
WNV has not been shown to increase the risk of abnormalities in a fetus and/or miscarriage.
It is recommended that mothers infected with WNV stop breast-feeding.
There have been no documented cases of occupation related percutaneous inoculation with WNV.
The WNV incubation period is from 2 to 14 days with most symptoms appearing within 2 to 6 days.
Usually lasts, on average 6.5 days.
Is the least serious symptom of infection
May only be diagnosed by screening tests
All of the above.
Mild WNV, West Nile fever
Affects about 20% of people infected with WNV.
Affects about 80% of people infected with WNV.
The rash associated with West Nile fever
Appears 2 weeks after onset of symptoms.
Is maculopapular, erythematous, diffuse and painful.
None of the above.
The most common long term symptom of West Nile fever is:
Is similar to bacterial meningitis.
Is always accompanied by neck stiffness and photophobia.
Occurs in 20% to 30% of WNV infections of the central nervous system.
Has a high mortality rate.
Often presents with seizures.
Progresses to coma in about 15% of cases.
Always presents with the same symptoms.
None of the above.
WNV-associated acute flaccid paralysis:
Occurs primarily in children in the United States.
Can occur alone or with meningitis and/or encephalitlis
Which of the following treatments are approved for WNV in the USA:
Human immunoglobulin (Omr-IgG-am)
None of the above
Besides exposure to mosquitoes, age is the most important risk factor for developing serious west nile virus related illness.
Which mosquito repellent is intended for use on clothing, shoes, bed nets and camping gear?
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