Parasitology

Question 1

Entamoeba Hystolitica

Tx: Metronidazole

Answer 1

Transmission:
Fecal-oral route

Infective Stage:
Mature Cysts

Diagnostic Stage:
Trophozoites, mature cysts, immature cysts

Question 2

Giardia lamblia

Tx: Metronidazole

Answer 2

Transmission:
Fecal-oral route

Infective Stage:
Cysts

Diagnostic Stage:
Trophozoites, cysts

Question 3

Cryptosporidium Parvum

Tx: Nitazoxanide

Answer 3

Transmission:
Fecal-oral route

Infective Stage:
Thick-walled Oocysts

Diagnostic Stage:
Thick- walled Oocysts

Question 4

Trichomonas Vaginalis

Tx: Metronidazole

Answer 4

Transmission:
Sexual intercourse; “Ping-pong” transmission

Infective Stage:
Trophozoites

Diagnostic Stage:
Trophozoites

Question 5

Plasmodium

Tx: vivax + ovale: Chloroquine + Primaquine

Tx: falciparum + malariae: Chloroquine

Answer 5

Transmission:
Bite of infected female mosquito
(Anopheles flavirostris minimus)

Infective Stage:
Sporozoites

Diagnostic Stage:
Trophozoites (ring forms

Question 6

Toxoplasma gondii

Tx: Sulfadiazine + Pyrimethamine

Answer 6

Transmission:
Ingestion of cysts
Transplacentally

Infective Stage:
Fecal oocysts

Diagnostic Stage:
Trophozoites
(bradyzoites)

Question 7

Trypanosoma cruzi

Tx: Nifurtimox

Answer 7

Transmission:
Bite of Reduviid (Triatoma) bug

Infective Stage:
Metacyclic trypomastigotes

Diagnostic Stage:
Trypomastigotes in blood

Question 8

Trypanosoma brucei

West
Tx: Early: Pentamidine
Tx: CNS: Eflornithine

East
Tx: Early: Suramin
Tx: CNS: Melarsoprol

Answer 8

Transmission:
Bite of Tsetse (Glossina) fly

Infective Stage:
Metacyclic trypomastigotes

Diagnostic Stage:
Trypomastigotes in blood