Cysts enter the mouth. Trophozoites are released from cysts. 1 µm' Cysts pass through the stomach to the 2 Trophozoites multiply in intestine. lower small intestine. Dehydration in large intestine stimulates 5 cyst development. Trophozoite Cyst Mature cysts or trophozoites are eliminated in the feces to contaminate soil, water, hands, and food. 10 um FIGURE 24.22 Life Cycle of Giardia lamblia

What is syphilis and how many stages does it have?

Name the pathogen which causes malignant malaria.

How can we prove the pathological and clinical effects of cholera are caused by the production of enterotoxin?

Why would infectious myringitis be of concern in a preschool?

Which of the following is NOT true about syphilis? Caused by a spirochete bacterium, Treponema pallidum None of the other four answers (All are true of syphilis) Secondary stage of syphilis is characterized by rubbery masses (gummas) in brain, cardiovascular system, skin, or other sites Primary stage is characterized by hard-based painless lesion called a chancre Can be diagnosed serologically using an indirect fluorescent antibody test (indirect immunofluorescence)

Describe the pathogenesis of an untreated case of Neisseria gonorrhea

List several differences between lepromatous and tuberculoidleprosy.

Describe the pathology of rubella.

Where is the portal of exit of Legionellosis (Legionnaires disease) and what are its hosts?