Parasitology Exam 1 With Correct Questions and Answers 2023

Transplacental transmission of this pathogen can lead to still births or spontaneous abortions in pregnant women and encephalitis in immune compromised individuals. - Toxoplasma gondii Causative agent of African Trypanosomiasis (Sleeping sickness) - T. brucei Which statement correctly describes parasitism: - Where one member lives in or on another organism at the expense of the host. Which of these characteristics is *NOT* correct for the protozoan parasites? - pseudopodium - microspora Can be diagnosed by the Schuffner's dots and oblong shape during the ring stage _________ - Plasmodium ovale Has an irregular cycle and schizogany does not occur in peripheral blood ________ - Plasmodium falciparum Is the most common worldwide, is generally not fatal, and has a tertian (48 hr) cycle _________ - Plasmodium vivax Diagnosed by banana-shaped macrogametes in a blood smear ________ - Plasmodium falciparum Is found in both subtropical and temperate climates, and has a 72-hour cycle ______ - Plasmodium malariae Leads to cerebral malaria _______ - Plasmodium falciparum Vector: Malaria (Plasmodium species) _____________ - Anopheles mosquito Vector: Chagas' disease ____________ - reduviid bug (kissing bug) Vector: African sleeping sickness________ - tsetse fly Vector: Leishmaniasis _____________ - Sandfly Which of these stages happen in the mosquito during malaria parasite development? - In the stomach, the macrogamete (female) and microgamete (male) will mate forming a zygote, which will then become an ookinete. The ookinete will penetrate the stomach wall to become an oocyst. The oocyst gives rise to sporozoites, which break out and eventually enter the salivary glands of the mosquito. The sporozoites will be injected to the next host during a blood meal Which parasitic disease do these symptoms describe: Romona's sign, dementia, megacolon, and heart disease? - Chagas' disease Which of these parasites can cause eye problems (vision problems or blindness)? - Acanthamoeba Toxoplasma Which of these parasites is considered an STD? - Trichomonas Which of these organisms is the causative agent of the most deadly form of malaria? - Plasmodium falciparum 20. What is the "definitive host" for parasitic infections? - The host where sexual reproduction takes place. Infective Stage: Giardia _____ - cyst Infective Stage: Trypanosoma brucei ______ - metacyclic trypomastigote Infective Stage: Trichomonas vaginalis _______ - Trophozoite Infective Stage: Plasmodium _________ - sporozoite Infective Stage: Leishmania _________ - promastigote Infective Stage: Trypanosoma cruzi _________ - metacyclic trypomastigote Infective Stage: Toxoplasma gondi __________ - cyst