Parasitology: In-House Review
The key characteristic of the developing trophozoite of this Plasmodium spp. is the formation of nonamoeboid solid cytoplasm assuming a band, bar, oval, or roundish shape a. Plasmodium ovale b. Plasmodium vivax c. Plasmodium malariae d. Plasmodium falciparum e. Both A and B
Answer: C. Plasmodium malariae
This plasmodium spp. is associated with disease and conditions such as Quartan Malaria and primarily infects mature RBCs a. Plasmodium ovale b. Plasmodium vivax c. Plasmodium malariae d. Plasmodium falciparum e. Plasmodium knowlesi
Answer: C. Plasmodium malariae
What is the natural intermediate host of Toxoplasma gondii? a. Man b. Dog c. Rat d. Cat e. None of the above
Answer: C. Rat
What is the preferred method of collection for the E. vermicularis? a. Flotation technique b. Direct fecal smear c. Scotch tape test d. Sheater's test
Answer: C. Scotch Tape Test
What do you call the malarial pigments present in Plasmodium knowlesi? a. Ziemann's b. Schuffner's c. Sinton-Mulligan's d. Maurer's e. James'
Answer: C. Sinton-Mulligan's
In the laboratory, the primary source in the chain of infection would be? a. Patients b. Needlesticks c. Specimens d. Biohazardous waste
Answer: C. Specimens
Which of the following is the largest species of Trichomonas? a. T. hominis b. T. tenax c. T. vaginalis d. NOTA
Answer: C. T. vaginalis
Pear-like shaped trophozoite is a description of what flagellate? a. T. vaginalis b. C. mesnili c. G. lamblia d. AOTA
Answer: D. AOTA
Vector of T. cruzi A. Reduviid bug b. Kissing bug c. Triatomid bug d. AOTA e. NOTA
Answer: D. AOTA
Which of the following serves as the intermediate hosts and vectors of W. bancrofti? a. Culex spp. b. Aedes spp. c. Anopheles spp. d. All of the above
Answer: D. All of the above
Considered as the largest protozoan to humans. Its trophozoites may measure rom 28 to 152 um in length and with an average width of 40 um. a. Isospora belli b. Toxoplasma gondii c. Blastocystis hominis d. Balantidum coli
Answer: D. Balantidum coli
What is the natural final host of Toxoplasma gondii? a. Man b. Dog c. Rat d. Cat e. None of the above
Answer: D. Cat
What amoeba cyst has a well-defined glycogen mass which is unstained when subjected to Trichrome? a. Entamoeba histolytica b. Entamoeba coli c. Endolimax nana d. Iodamoeba butschlii
Answer: D. Iodamoeba butschlii
The following statements are true of rhabditiform larva of Strongyloides stercoralis except: a. The larva is equipped with short buccal cavity b. Has a prominent genital primordium c. the primary morphologic seen in stool d. It is the infective stage to humans
Answer: D. It is the infective stage to humans
Which filarial nematode causes river blindness? a. Loa loa b. Brugia malayi c. Onchocerca volvulus d. Wuchereria bancrofti
Answer: C. Onchocerca volvulus
What is the specimen of choice for isolation of E. gingivalis? a. Stool b. Urine c. Oral swab d. CSF
Answer: C. Oral swab
PAM mimics what disease which shows the characteristic "Kernig's sign" a. Pulmonary tuberculosis b. Dysentery c. Meningitis d. Giardiasis
Answer: C. Meningitis
Diagnostic stage of L. donovani
Amastigote
Infective stage to the sandfly?
Amastigote
In the life cycle of malaria, where does sexual life cycle happen? a. Human RBC b. Liver (man) c. Mosquito d. All of the above
Answer: C. Mosquito
Decide if the following statements are true or false: a. Both statements are true b. Both statements are false c. First statement is true, second is false d. First statement is false, second is true 1. Cestodes like H. nana, T. solium, T. saginata, D. latum, H. diminuta, D. latum, and D. caninum belongs to cyclophyllidean. Ova/eggs of pork and beef tapeworm contains an oncosphere enclosed in an inner membrane with two polar thickenings with striations with six hooklets inside. 2. Cestode like Taenia solium and Dipylidium caninum require vertebrate intermediate host. Pseudophylidean requires two intermediate host 3. Taenia saginata has 15 to 20 lateral branches dichotomous or Tree-like gravid proglottids. Taenia solium has 7 to 15 lateral branches dendritic or finger-like gravid proglottids 4. Cysticercoid larva is the infective stage of D. caninum and H. diminuta. Immunologic test like Bentonite flocculation
Answer 1. B 2. D 3. A 4. A 5. D
The following statements are true of W. bancrofti microfilariae except: a. Its microfilaria has a delicate sheath which surrounds the organism b. The posterior end culminates in a point that is free of nuclei c. Optimal samples for blood smears should be collected at night d. None of the above
Answer not found. Please check reference book.
Which of the following is not a characteristic or description of E. histolytica? a. 1-8 nuclei in cystic form b. 1-4 nuclei in cystic form c. 1 nuclei in trophozoite d. Infective stage in the quadrinucleated cyst
Answer: A. 1-8 nuclei in cystic form
Which filarial nematode can be distinguished by having two distinct nuclei at the tips of its microfilariae a. B. malayi b. Loa loa c. W. bancrofti d. O. volvulus
Answer: A. B. malayi
Which of the following is not a mode of transmission of Babesia? a. Bite of an infected Anopheles mosquito b. Blood transfusion c. Bite of an Ixodes tick d. Sharing of infected needles
Answer: A. Bite of an infected Anopheles mosquito
Which of the following has a centrally located fluid-filled structure which consumes almost 90% of organism and organelles are pushed to the periphery? a. Blastocystis hominis b. Pneumocystis jiroveci c. Sarcocystis species d. Microsporidia
Answer: A. Blastocystis hominis
Which of the following is classified now as a stramenophile? a. Blastocystis hominis b. Pneumocystis jiroveci c. Sarcocystis species d. Microsporidia
Answer: A. Blastocystis hominis
Which of the following contains the characteristic of having ingested red blood cells in the cytoplasm? a. E. histolytica b. E. coli c. E. nana d. I. butschlii
Answer: A. E. histolytica
Parasites that need a host at some stage of their life cycle to complete their development and to propagate a. Facultative parasite b. Permanent parasite c. Accidental or incidental parasite d. Obligate parasites
Answer: A. Facultative parasite
Gay bowel syndrome is associated with what flagellate? a. G. lamblia b. T. vaginalis c. D. fragilis d. Both A and B e. Both A and C
Answer: A. G. lamblia
What is the preferred stain for malaria or trypanosomes in thin blood smear? a. Giemsa stain b. Haematoxylin-eosin c. Lugol's iodine d. Leishmania stain e. A and B only
Answer: A. Giemsa stain
Ground itch occurs with which worm infection? a. Hookworm b. Pinworm c. Threadworm d. Whipworm
Answer: A. Hookworm
It is a common parasite in mice and the smallest to infect humans, measuring up to 4.0 cm in length a. Hymenolepis nana b. Hymenolepis diminuta c. Both A and B d. Neither A nor B
Answer: A. Hymenolepis nana
What age of the red blood cell does P. vivax typically invade? a. Immature/Young RBCs b. Mature RBCs c. All RBCs (mature and immature) d WBCs and young RBCs only
Answer: A. Immature/Young RBCs
When is the best time to collect blood for Plasmodium falciparum detection? a. In between paroxysms b. Morning c. Evening d. Anytime of the day
Answer: A. In between paroxysms
What is the mode of transmission of sarcocystis? a. Ingestion of raw infected meat b. Ingestion of infected fish c. Ingestion of embryonated egg d. Association with cats
Answer: A. Ingestion of raw infected meat
Which of the following harbors part or all the larval stages of the parasites? a. Intermediate host b. Final or definitive host c. Reservoir host d. Paratenic host
Answer: A. Intermediate host
Soil-transmitted helminths are the collective name for the following: a. Large intestinal roundworm, whipworm, and hookworm b. Pinworm, whipworm, and hookworm c. Guinea worm, pinworm, and hookworm d. Threadworm, pinworm, large intestinal roundworm
Answer: A. Large intestinal roundworm, whipworm, and hookworm
Which of the following is the first intermediate host of Fasciola hepatica? a. Lymnaea philippinensis b. Watercress c. Crayfish d. Oncomelania snail
Answer: A. Lymnaea philippinensis
This refers to the phenomenon whereby microfilariae are present in the blood stream during a specific time. a. Periodicity b. Paroxysmal c. Hakansson's d. None of the above
Answer: A. Periodicity
Name of the miscellaneous protozoa that is now identified as a fungus: a. Pneumocystis jiroveci b. Isospora belli c. Cryptosporidium parvum d. Cyclospora cayatenensis
Answer: A. Pneumocystis jiroveci
Which of the following morphologic form of Toxoplasma gondii is infective to humans when ingested? a. Sporulated oocyst b. Tachyzoites c. Trophozoites d. Sporozoites
Answer: A. Sporulated oocyst
The following are intestinal species under flagellates except: a. T. tenax b. G. intestinalis c. T. hominis d. D. fragilis
Answer: A. T. tenax
The treatment of choice for Trypanosoma spp. is situation-dependent, and is dictated by a number of factors including patient age, stage of disease, and whether the patient is pregnant at the time A. True B. False
Answer: A. True
Rectal prolapse can occur with which nematode infection? a. Whipworm b. Pudoc worm c. Pinworm d. Guinea worm
Answer: A. Whipworm
B. timori is readily distinguished from B. malayi. Microfilariae of B. timori differ from B. malayi by having a longer cephalic space, a sheath that does not stain with Giemsa, and a larger nuber of single-file nuclei towards the tail. a. 1st statement is correct, 2nd statement is incorrect b. 1st statement is incorrect, 2nd statement is correct c. Both statements are correct d. Both statements are incorrect
Answer: B. 1st statement is incorrect, 2nd statement is correct
How any times does the Strongyloides stercoralis L1 larvae have to molt to enter the free-living cycle: a. 1 b. 2 c. 3 d. 4
Answer: B. 2
When should the specimen collection done during E. vermicularis diagnosis? a. 2 consecutive mornings b. 3 consecutive mornings c. 4 consecutive mornings d. 5 consecutive mornings
Answer: B. 3 Consecutive mornings
Loeffler's syndrome occurs in which nematode infection? a. Trichuris trichiura b. Ascaris lumbricoides c. Necator americanus d. Dracunculus medinensis
Answer: B. Ascaris lumbricoides
The specimen of choice for the recovery of Babesia is: a. Urine b. Blood c. Stool d. Cerebrospinal fluid (CSF)
Answer: B. Blood
Stiff rotary motility is exhibited by what parasite? a. G. lamblia b. C. mesnili c. D. fragilis d. T. vaginalis
Answer: B. C. mesnili
Which of the following is the infective stage of the pork tapeworm? a. Metacercaria b. Cysticercus larva c. Pleurocercoid d. Cercaria
Answer: B. Cysticercus larva
Which of the following has a centrally located rosette shaped uterus? a. T. saginata b. D. latum c. E. granulosus d. H. diminuta
Answer: B. D. latum
What is the Gold Standard in the recovery of G. intestinalis? a. RT-PCR b. Direct Fluorescent Ab Assay c. Western Immunoblot d. Enterotest
Answer: B. Direct Fluorescent Ab Assay
It has a horse-shape collar of spines (circumoral disk) around the oral suckers a. S. japonicum b. E. ilocanum c. F. buski d. P. westermani
Answer: B. E. ilocanum
What harbors the adult or sexual stage of the parasites? a. Intermediate host b. Final or definitive host c. Reservoir host d. Paratenic host
Answer: B. Final or definitive host
What is the causative agent of PAM? a. Gardia lamblia b. Naegleria fowleri c. Acanthamoeba d. Entamoeba hystolitica
Answer: B. Naegleria fowleri
The first intermediate host of this trematode is Antemelania asperata a. F. hepatica b. P. westermani c. F. buski d. H. heterophyes
Answer: B. P. westermani
It was once thought to be solely a parasite of Old World monkeys. It has been recently identified in humans suffering from parts in Malaysia and other parts of Southeast Asia. a. Plasmodium ovale b. Plasmodium knowlesi c. Plasmodium malariae d. Plasmodium falciparum
Answer: B. Plasmodium knowlesi
Which of the following is the causative agent of Atypical Interstitial plasma cell pneumonia? a. Blastocystis hominis b. Pneumocystis jiroveci c. Sarcocystis species d. Microsporidia
Answer: B. Pneumocystis jiroveci
Pila luzonica (kuhol) is the ____ IH of E. ilocanum? a. First IH b. Second IH c. Third IH d. Fourth IH
Answer: B. Second IH
What Trichomonas species resides in the oral cavity? a. T. hominis b. T. tenax c. T. vaginalis d. NOTA
Answer: B. T. tenax
What is the culture media for E. histolytica and G. intestinalis? a. Non-nutrient agar seeded with E. coli b. TYI-S-33 c. Novy McNeal Nichole d. Chocolate Agar
Answer: B. TYI-S-33
The following statements are true of filarial worms except: a. These are also nematodes in which the adult worms live in tissue or lymphatic system b. The adult filariae produce larvae called microfilariae that are usually seen in the stool. c. These microfilariae exhibit periodicity d. Vectors of filarial nematodes include biting insects such as mosquitoes
Answer: B. The adult filariae produce larvae called microfilariae that are usually seen in the stool.
Which statement is true/correct about Babesia? a. Babesia is transmitted via the bite of an infected Anopheles mosquito containing sporozoites b. The timing of the blood collection for the study of Babesiasis is not crucial to success in retrieving the Babesia since they have not shown periodicity c. Man is the intermediate host of Babesia species d. All of the above
Answer: B. The timing of the blood collection for the study of Babesiasis is not crucial
Nurse-cell larval complexes are found in which worm's lifecycle? a. Ancylostoma duodenale b. Trichinella spiralis c. Enterobius vermicularis d. Capillaria philippinensis
Answer: B. Trichinella spiralis
What do you call the spine-like pseudopods present in Acanthamoeba spp.? a. Endoplasm b. Ectoplasm c. Acanthopodia d. Trophozoite
Answer: C. Acanthopodia
Centrifuging an uncapped specimen may produce a biological hazard in the form of? a. Specimen contamination b. Sharps contamination c. Aerosols d. Vectors
Answer: C. Aerosols
Falling leaf motility is exhibited by what parasite? a. G. lamblia b. G. intestinalis c. Both d. Neither
Answer: C. Both
What tapeworm requires two intermediate hosts? a. D. caninum b. E. granulosus c. D. latum d. T. saginata
Answer: C. D. latum
What amoeba cyst ha a characteristic "blotlike" karyosome, no peripheral chromatin, and is known for its characteristic cross-eyed appearance? a. Entamoeba histolytica b. Entamoeba coli c. Endolimax nana d. Iodamoeba butschlii
Answer: C. Endolimax nana
If fecal specimens cannot be examined immediately, they should be? a. Left at room temperature b. Frozen c. Fixed in formalin or preservative d. Kept at body temperature
Answer: C. Fixed in formalin or preservative
What is the mode of transmission of E. histolytica? a. Sexual intercourse b Ingestion of improperly cooked meat c. Ingestion of quadrinucleated cyst d. Skin penetration
Answer: C. Ingestion of quadrinucleated cyst
The following statements about Ancylostoma duodenale and Necator americanus are true except: a. The buccal capsule of N. americanus contains a pair of cutting plates, whereas the A. duodenale consists of actual teeth b. The male is equipped with a prominent, posterior, umbrella like structure that aids in copulation, known as copulatory bursa c. The hook is much more pronounced in N. americanus than A. duodenale d. None of the above
Answer: D. None of the above
The following statements are true of O. volvulus except: a. The blackfly genus Simulium is responsible for transmitting O. volvulus b. The microfilariae of O. volvulus are found in the subcutaneous tissue and not blood specimens c. Adult worms are thin and wire-like in appearance d. None of the above
Answer: D. None of the above
Which of the following microfilariae does not possess a sheath? a. W. bancrofit b. B. malayi c. L. loa d. O. volvulus
Answer: D. O. volvulus
What fluke resembles a coffee bean and its body is covered with spines? a. F. buski b. F. hepatica c. E. ilocanum d. P. westermani
Answer: D. P. westermani
Which of the following harbors the parasite in an arrested state of development? a. Intermediate host b. Final or definitive host c. Reservoir host d. Paratenic host
Answer: D. Paratenic host
This Plasmodium spp. is associated with disease and conditions such as Black Water fever and Malignant Tertian Malaria. a. Plasmodium ovale b. Plasmodium vivax c. Plasmodium malariae d. Plasmodium falciparum
Answer: D. Plasmodium falciparum
Properly cooking of fish is a control method for which worm? a. Whipworm b. Pinworm c. Threadworm d. Pudoc worm
Answer: D. Pudoc worm
Which fluke resides in the Oncomelania as its intermediate host? a. P. westermani b. H. heterophyes c. F. buski d. S. japonicum
Answer: D. S. japonicum
What stage of reproduction is considered capable of autoinfection of Cryptosporidium? a. Intact oocysts b. Merozoites c. Gametocytes d. Sporozoites
Answer: D. Sporozoites
Parthenogenensis occur in which worm? a. Ascaris lumbricoides b. Enterobius vermicularis c. Hookworms d. Strongyloides stercoralis
Answer: D. Strongyloides stercoralis
Neurocysticercosis is the deposition of oncospheres in the brain which occurs in infection of what tapeworm. a. T. saginata - ingestion of contaminated beef b. T. solium - ingestion of contaminated pork c. T. saginata - ingestion of egg from human feces d. T. solium - ingestion of egg from human feces
Answer: D. T. solium - ingestion of egg from human feces
Rapid, jerky, tumbling motility is a characteristic motility of what flagellate? a. G. lamblia b. C. mesnili c. D. fragilis d. T. vaginalis
Answer: D. T. vaginalis
Morphologic characteristics of trematodes are the following except: a. Two suckers, oral and ventral b. Bilaterally symmetric, leaf shape or tongue like c. Without body cavity d. Trematodes parasitizing human belong to the order Monogenea
Answer: D. Trematodes parasitizing human belong to the order Monogenea
The following statements are true of Loa loa except: a. Human infection of Loa loa is initaited by the biote of an infected Chrysops fly b. Its common name is eyeworm c. Nuclei fill the organism and are continuous to the tip of the pointed tail d. the circulating adult worms in the subcutaneous tissue usually causes severe pain
Answer: D. the circulating adult worms in the subcutaneous tissue usually causes severe pain
All flagellates inhabit the large intestine except: a. G. lamblia b. T. vaginalis c. D. fragilis d. Both A and B e. A, B, and C
Answer: E. A, B, and C
Which of the trematodes is also known as Garrison's fluke? a. H. heterophyes b. F. buski c. E. ilocanum d. F. hepatica
Answer: E. ilocanum
What parasitic stage has an undulating membrane which measures half the body length?
Epimastigote
Montenegro skin test is used to screen large population of patients for infection caused by?
L. donovani complex
Causes Oriental Boil, Baghdad, or Delhi Boil
L. tropica complex
Attached to the axoneme nearing to the edge of the organism? [Disclaimer: Question Unclear/Inaccurate]
Nucleus [Disclaimer: Question Unclear/Inaccurate]
Causative agent of West African Sleeping Sickness
T. gambiense
Infective stage of T. gambiense
Trypomastigote
