Name the Protozoa studied in class.

(3)

• Entamoeba histolytica
• Giardia lamblia
• Plasmodium spp. 

Name the helminths studied in class.

(4)

• Tapeworms
• Schistosoma
• Ascaris lumbricoides
• Trichinella spiralis 

Giardia lamblia

•  intestinal flagellate; lives on mucosa of small bowel

Disease: Giardiasis (diarrhea)

Transmission: fecal-oral (contaminated water); animal resevoir.

Diagnosis: cysts in stool sample

Plasmodium falciparum

• Are of concern as they are in so many mammels
• can be asymptomatic
• transmission by eating undercooked meat
• diagnosis by eggs and/or gravid proglottids in stool 

• intestinal roundworm
• migratory stage in lungs
• can cause atypical pneumonia from coughing up the worms
• transmission by eggs ingestion of eggs in contaminated soil, water, or food
• diagnosis by eggs in feces or worms coughed up 

• blood flukes
• adult worms live in blood vessels around intesine or bladder
• eggs in tissues
• transmission is through skin by the cercariae which are released into water by intermediate host snail
• Disease: Schistomiasis
• diagnosis: eggs in urine or stool

• round worms
• adults in the intestine; coiled larvae in muscles
• infects and matures in many mammels
• Transmission: undercooked meet, usually pork and fish
• Disease: Trichinellosis
• Diagnosis: muscle biopsy