21. The vector involved in African sleeping sickness is the A. reduvid, “kissing,” bug. B. tsetse fly. C. Anopheles mosquito. D. phlebotomine (sand) fly E. hard bodied tick. 22. Ascaris lumbricoides A. is an intestinal roundworm B. spreads to humans by ingestion of Ascaris eggs in food. C. larvae penetrate into lymphatics and capillaries around intestines D. larvae migrate to the pharynx, get swallowed, and return to intestines to mature. E. All of the choices are correct. 23. Epstein-Barr virus has the following characteristics, except A. it infects the respiratory epithelium. B. it is transmitted by direct oral contact and saliva. C. it multiplies and is latent in the parotid gland. D. it has a 30-50 day incubation. E. it can be transmitted by contaminated blood transfusions and organ transplants 24. Schistosomiasis involves A a blood fluke. B. eggs from humans enter water and develop into miracidium. C. snails allow development into cercaria. D. cercarlae enter hair follicles and pass to the blood and then the liver E. All of the choices are correct 25. Fasciola hepatica is a A lung fluke. B. blood fluke. C. liver fluke. D. roundworm. E. filarial worm. 26. All of the following are characteristics of Campylobacter jejuni except A. it is transmitted through ingestion of contaminated chicken, meat, milk, and water B. it causes fever and a watery to bloody diarrhea. C. it infects the stomach. D. it produces an enterotoxin called CIT that stimulates diarrhea. E. it has gram negativec rods with darting motility