Parasitology Exam 4
1) Which of the following stages in the Plasmodium life cycle is associated with sporogony?
a. merozoite
b. oocyst
c. none of the above
d. trophozoite
e. hypnozoite
2) Which of the following confers resistance to Plasmodium vivax?
a. recrudescence
b. Sickle cell trait
c. presence of Duffy blood group
d. absence of Duffy blood group
e. none of the above
3) Which of the following is a characteristic of Plasmodium falciparum?
a. Sickle cell trait confers resistance
b. accounts for 50% of all malaria cases
c. sequestration occurs along endothelium
d. 4 different pathways to invade RBCs
e. all of the above
4) Which of the following stages is infective to humans in the Plasmodium life cycle?
a. gametocyte
b. merozoite
c. trophozoite
d. sporozoite
e. schizont
5) Which of the following best describes hypnozoites?
a. They cause cerebral malaria
b. Dormant liver stages causing relapse
c. Gametocytes found in mosquito gut
d. Formed by Plasmodium malariae
e. Released during schizogony in RBCs
6) Which species of Plasmodium is most associated with cerebral malaria?
a. P. vivax
b. P. ovale
c. P. falciparum
d. P. malariae
e. P. knowlesi
, 7) Which of the following forms is released from liver cells into the bloodstream?
a. sporozoite
b. gametocyte
c. merozoite
d. zygote
e. ookinete
8) Which of the following undergoes exflagellation in the mosquito midgut?
a. microgametocyte
b. macrogametocyte
c. merozoite
d. sporozoite
e. trophozoite
9) Which of the following malaria types has a 72-hour fever cycle?
a. tertian malaria
b. quotidian malaria
c. quartan malaria
d. malignant tertian malaria
e. recrudescent malaria
10) Which parasite lacks exoerythrocytic stages (i.e., no liver stage)?
a. Plasmodium vivax
b. Plasmodium ovale
c. Babesia microti
d. Plasmodium malariae
e. Toxoplasma gondii
11) What is the infective stage of Babesia microti for humans?
a. gametocyte
b. oocyst
c. trophozoite
d. sporozoite
e. merozoite
12) Which of the following statements is true about Cryptosporidium parvum?
a. Transmission occurs through tick bite
b. Infection requires presence of Duffy antigens
c. Infects the liver and causes relapse
d. Causes watery diarrhea, especially in immunocompromised hosts
e. Forms tissue cysts in muscle
13) Which of the following is the definitive host of Toxoplasma gondii?
a. humans
1) Which of the following stages in the Plasmodium life cycle is associated with sporogony?
a. merozoite
b. oocyst
c. none of the above
d. trophozoite
e. hypnozoite
2) Which of the following confers resistance to Plasmodium vivax?
a. recrudescence
b. Sickle cell trait
c. presence of Duffy blood group
d. absence of Duffy blood group
e. none of the above
3) Which of the following is a characteristic of Plasmodium falciparum?
a. Sickle cell trait confers resistance
b. accounts for 50% of all malaria cases
c. sequestration occurs along endothelium
d. 4 different pathways to invade RBCs
e. all of the above
4) Which of the following stages is infective to humans in the Plasmodium life cycle?
a. gametocyte
b. merozoite
c. trophozoite
d. sporozoite
e. schizont
5) Which of the following best describes hypnozoites?
a. They cause cerebral malaria
b. Dormant liver stages causing relapse
c. Gametocytes found in mosquito gut
d. Formed by Plasmodium malariae
e. Released during schizogony in RBCs
6) Which species of Plasmodium is most associated with cerebral malaria?
a. P. vivax
b. P. ovale
c. P. falciparum
d. P. malariae
e. P. knowlesi
, 7) Which of the following forms is released from liver cells into the bloodstream?
a. sporozoite
b. gametocyte
c. merozoite
d. zygote
e. ookinete
8) Which of the following undergoes exflagellation in the mosquito midgut?
a. microgametocyte
b. macrogametocyte
c. merozoite
d. sporozoite
e. trophozoite
9) Which of the following malaria types has a 72-hour fever cycle?
a. tertian malaria
b. quotidian malaria
c. quartan malaria
d. malignant tertian malaria
e. recrudescent malaria
10) Which parasite lacks exoerythrocytic stages (i.e., no liver stage)?
a. Plasmodium vivax
b. Plasmodium ovale
c. Babesia microti
d. Plasmodium malariae
e. Toxoplasma gondii
11) What is the infective stage of Babesia microti for humans?
a. gametocyte
b. oocyst
c. trophozoite
d. sporozoite
e. merozoite
12) Which of the following statements is true about Cryptosporidium parvum?
a. Transmission occurs through tick bite
b. Infection requires presence of Duffy antigens
c. Infects the liver and causes relapse
d. Causes watery diarrhea, especially in immunocompromised hosts
e. Forms tissue cysts in muscle
13) Which of the following is the definitive host of Toxoplasma gondii?
a. humans
