North America in 1999. It is commonly spreac by mosquitoes which become carriers after feeding on infected birds. Most people who are infected do not develop any signs or symptoms. About 1 in 5 people will develop a fever and complain of headache, joint pains, or a rash. Less than 1% of patients develop inflammation of the hrain which can load

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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West Nile virus was first detected in North America in 1999. It is commonly spread
by mosquitoes which become carriers after feeding on infected birds. Most people
who are infected do not develop any signs or symptoms. About 1 in 5 people will
develop a fever and complain of headache, joint pains, or a rash. Less than 1% of
patients develop inflammation of the brain which can lead to coma and seizures.
About 0.1% of infected people die. According to the CDC, Delaware had no reported
cases in 2009 and 2010, 1 case in 2011, and 9 cases in 2012. Transmission rarely
occurs between humans and has only been observed through blood transfusions,
organ transplants, or from mother to baby during pregnancy.
1. Is the virus spread mainly by horizontal or vertical transmission?
2. List one of the symptoms of the disease.,
3. List one of the signs of the disease.
4. What is the mortality rate for the disease? ("
5. What was the incidence for Delaware in 2009?
6. What was the incidence for Delaware in 2012?,
7. Do you think West Nile virus is an endemic disease or an emerging disease in
Delaware? Explain.
Transcribed Image Text:West Nile virus was first detected in North America in 1999. It is commonly spread by mosquitoes which become carriers after feeding on infected birds. Most people who are infected do not develop any signs or symptoms. About 1 in 5 people will develop a fever and complain of headache, joint pains, or a rash. Less than 1% of patients develop inflammation of the brain which can lead to coma and seizures. About 0.1% of infected people die. According to the CDC, Delaware had no reported cases in 2009 and 2010, 1 case in 2011, and 9 cases in 2012. Transmission rarely occurs between humans and has only been observed through blood transfusions, organ transplants, or from mother to baby during pregnancy. 1. Is the virus spread mainly by horizontal or vertical transmission? 2. List one of the symptoms of the disease., 3. List one of the signs of the disease. 4. What is the mortality rate for the disease? (" 5. What was the incidence for Delaware in 2009? 6. What was the incidence for Delaware in 2012?, 7. Do you think West Nile virus is an endemic disease or an emerging disease in Delaware? Explain.
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