21. Principles of Disease

Which of the following is most effective in preventing infection by Giardia? __________          

a. Sexual abstinence

b. Drinking only bottled water

c. Use of insect repellent

d. Cooking all food

Which of the following statements is false?

a. B19 virus is the primary parvovirus of humans.

b. Erythema infectiosum is caused by a parvovirus.

c. In children, parvovirus infections are accompanied by a high mortality rate.

d. Parvovirus infection in humans results in infectious reddening of the skin.

Name two similarities between Ebola and Marburg infections.

Which of the following systemic mycoses is endemic to the deserts of the southwestern

United States?

a. Blastomycosis

b. Coccidioidomycosis

c. Histoplasmosis

d. Paracoccidioidomycosis

Which of the following statements is true concerning variola major?

a. It carries a mortality rate of less than 1%.

b. It affects internal organs before appearing on the skin.

c. The causative virus has been totally eradicated from Earth.

d. The skin lesions it causes are smooth, waxy, tumorlike nodules on the face.

Which one of the following measures is the most effective way to prevent viral infections of the digestive system?

a. Antibiotics

b. Thoroughly cooking food

c. Decontaminating water

d. Washing hands

e. Disinfecting bathroom surfaces

A man experienced a laboratory accident in which he was infected with adenovirus. What signs or symptoms might he exhibit?

a. Sore throat

b. Headache

c. Pinkeye

d. All of the above

Identify the diseases based on the symptoms in the following chart.

The most common manifestation of Cryptococcus infection in AIDS patients is ________.

a. blindness

b. cutaneous infection

c. meningitis

d. pneumonia

The parasitic amoeba _____________ can be acquired by ingestion.

Dimorphic fungi exist as _____ forms in the environment and as _____ forms in their hosts.

The following helminths can directly penetrate the skin of humans to establish infection:, ____________ , _____________ , and ________________  (give genera only).