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Boards > Parasitology PRC 2007 > Flashcards

Parasitology PRC 2007 Flashcards

1
Q

Hookworms can cause iron deficiency anemia which is characterized as

A

Hypochromic microcytic

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2
Q 
All cestodes (tapeworms) have the following structures except: 
A. proglottids
B. scolex
C. neck
D. spicules
A

Spicules

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3
Q

This tapeworm may complete its life cycle in man without the need of an intermediate host

A

Hymenolepis nana

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4
Q

This tapeworm may cause cysticercosis when its eggs are ingested by man:

A

Taenia solium

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5
Q

This tapeworm may cause a hydatid cyst in man

A

Echinococcus granulosus

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6
Q

A 10 year old female from Samar presents with hepatosplenomegaly. You would want to run diagnostic tests to rule out

A

Schistosomiasis

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7
Q

Some areas endemic for schistosomiasis

A

Leyte Mindoro Samar Davao Sorsogon Bukidnon

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8
Q

The COPT is a diagnostic test which demonstrates the presence of antibodies against

A

Schistosoma Japonicum

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9
Q

A 10 year old girl from Samar presented with an enlarged abdomen. Splenomegaly was apparent and a Kato Thick Smear showed eggs with lateral knobs. This child is probably infected with

A

Schistosoma Japonicum

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10
Q

The drug of choice for schistosomiasis and most trematode (fluke) infections is

A

Praziquantel

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11
Q

The drug of choice for taeniasis and most cestode (tapeworm) infections is

A

Praziquantel

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12
Q

The drug of choice for invasive amebiasis, giardiasis and trichomoniasis is

A

Metronidazole

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13
Q

The recommended diagnostic test for Enterobius vermicularis (seatworm/pinworm) is

A

Peri-anal or cellulose tape swab

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14
Q

Which lab exam is the best step in identifying parasites responsible for chronic diarrhea

A

examination of concentrated stools using formol-ether concentration technique

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15
Q

Giardiasis can be diagnosed with what methods

A

Formol ether concentration test; string test where a ball of weighted string is ingested and pulled out to examine trophozoites; immunofluorescence

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16
Q

Trypanosoma cruzi is endemic in

A

South America

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17
Q

The tse-tse flies Glossina sp. are the vector for

A

Trypanosoma brucei

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18
Q

Romana’s sign - a swelling of the periorbital area - may be seen in

A

Trypanosoma cruzi

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19
Q

In cases of chronic diarrhea in communities where raw or inadequately cooked fish is traditionally eaten, which parasite would most likely be implicated?

A

Capillaria philippinensis

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20
Q

This parasite is fish-borne and causes chronic diarrhea

A

Heterophyes heterophyes

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21
Q

This parasite is snail-borne and causes diarrhea

A

Echinostoma ilocanum

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22
Q

In cases of chronic diarrhea with an underlying HIV infection; what parasite is most likely to be involved?

A

Cryptosporidium parvum

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23
Q

Which parasitic infections are repeated (periodic) chemotherapy of population groups a valid preventive and control measure?

A

Ascaris; Trichuris; Hookworms and Schistosoma

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24
Q

Why would Schistosoma Japonicum persist despite identifying and treating all infected individuals in a community?

A

Farm and domestic animals are reservoir hosts of Schistosoma japonicum

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25
Q

Entamoeba histolytica and Entamoeba dispar are best differentiated by

A

stool ELISA

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26
Q

Bloody diarrhea can be due to this parasitic infection

A

Entamoeba histolytica

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27
Q

The following can be acquired by drinking fecally-contaminated water except? Entamoeba histolytica; Giardia lamlia; Capillaria philippinensis; Cryptosporidium parvum

A

Capillaria philippinensis

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28
Q

Intestinal obstruction is a complication of

A

Ascaris

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29
Q

Mode of infection of hookworm

A

Skin penetration

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30
Q

Erratic migration into the bile duct occurs in

A

Ascaris

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31
Q

The stage of Enterobius vermicularis that is infective to man is

A

embryonated egg

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32
Q

The stage of development of Plasmodium which are responsible for malaria transmission

A

gametocytes

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33
Q

Which province is not endemic for malaria: Palawan; Mindoro; Sulu; Cebu

A

Cebu

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34
Q

The malaria preventive measure - chemoprophylaxis is not indicated for which high risk group?

A

pregnant women

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35
Q

As a malaria control measure, the use of Permethrin-treated mosquito nets is effective except in

A

in killing the larval stages of Anopheles

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36
Q

Drug of choice for severe and complicated malaria

A

Quinine

37
Q

The presence of schizonts in a P. falciparum smear indicates

A

bad prognosis

38
Q

Malabsorption and steattorhea (fatty acids) may be a clinical manifestation of this infection

A

Giardia lamblia

39
Q

Strawberry cervix may be a clinical feature of this infection

A

Trichomonas vaginalis

40
Q

Tse-tse fly is the vector for

A

Trypanosoma brucei

41
Q

Mode of infection of Schistosoma

A

Skin penetration

42
Q

The natural mode of transmission of Plasmodium is

A

mosquito bite

43
Q

Predominant species of Plasmodium in the Philippines

A

Plasmodium falciparum

44
Q

Species which causes cerebral malaria

A

P. falciparum

45
Q

Most common site in extra-intestinal amoebiasis is

A

Right lobe of liver

46
Q

The main pathology in schistosomiasis is

A

granuloma formation around eggs

47
Q

Habitat of adult Schistosoma japonicum

A

mesenteric veins

48
Q

Most common cause of death in chronic schistosomiasis

A

bleeding esophageal varices

49
Q

Cholangiocarcinoma is associated with

A

Opistorchis spp.

50
Q

The best time to collect blood to diagnose bancroftian filariasis

A

between 10 pm and 2 am

51
Q

Pathologies caused by adult ascaris

A

pneumonitis

52
Q

Clinical manifestations of angiostrongylosis may be

A

impairment of memory; disorientation; incoherence

53
Q

Preventive measure specific for strongyloidiasis and hookworm infection

A

use of protective shoes and gloves

54
Q

Respiratory symptoms can be observed in the following conditions except: Ascariasis Necatoriasis Strongyloidiasis Trichuriasis

A

Trichuriasis

55
Q

The trematode which is transmitted by skin penetration of infective cercaria

A

Schistosoma japonicum

56
Q

Granuloma formation and subsequent fibrosis around schistosome eggs result In

A

portal hypertension; hepatosplenomegaly; protosystemic collateral circulation

57
Q

Relapse which is caused by reactivation of hypnozoites is present in what Plasmodial species

A

P. vivax

58
Q

Malignant tertian fever is present in what Plasmodial species

A

P. falciparum

59
Q

Quartan malaria is characterized by a 72-hour (3-day) cycle of fever; chills and sweating. This is caused by:

A

Plasmodium malariae

60
Q

The flask-shaped ulcer is the characteristic lesion of what protozoa?

A

Entamoeba histolytica

61
Q

The species of ameoba which causes primary amebic meningoencephalitis is

A

Naegleria

62
Q

In communities of high socio-economic status; food borne amebiasis is transmitted through

A

food handlers who are asymptomatic cyst passers

63
Q

“Barbers-pole” is one of the diagnostic features of

A

Trichinella spiralis

64
Q

Man acquires infection with Trichinella spiralis by

A

ingestion of half-cooked meat containing encysted larvae

65
Q

Diagnosis of Trichinosis in man can be done by

A

biopsy of superficial skeletal muscle; Bentonite flocculation test (BFT); Fluorescent antibody test

66
Q

Chiclero’s ulcer usually found in the ear lobe may be seen in

A

Trypanosoma cruzi

67
Q

Winterbottom’s sign - a swelling of posterior cervical nodes - may be seen in

A

Trypanosoma brucei

68
Q

Espundia - a form of mucocutaneous ulcer - may be seen in

A

Leishmania braziliense

69
Q

Kala azar is characterized by hyperpigmentation of the skin and splenomegaly wth amastigotes found in the involved organs. The protozoan that causes this is

A

Leishmania donovani

70
Q

Hydrocoele is most likely caused by

A

Wuchereria bancrofti

71
Q

Nocturial periodicity is demonstrated by

A

Wuchereria bancrofti

72
Q

Confluent body nuclei is characteristic of

A

Brugia malayi

73
Q

The large intestine is the natural habitat of this adult worm

A

Trichuris trichiura

74
Q

In cutaneous larva migrans, what kind of host is man?

A

Man is an accidental host

75
Q

Rectal prolapse can occur with

A

Trichuris trichiura

76
Q

Perianal itching is a manifestation of infection with

A

Enterobius vermicularis

77
Q

Natural habitat of adult Paragonimus westermani

A

lungs

78
Q

Larvae pass through the lungs for all of these worms except: Ascaris lumbricoides
Trichuris trichiura
Ancylostoma duodenale
Necator americanus

A

Trichuris trichiura

79
Q

These parasites can all cause significant anemia except: Ascaris lumbricoides; Trichuris trichiura; Ancylostoma duodenale; Plasmodium falciparum

A

Ascaris lumbricoides

80
Q 
These parasites can involve the heart except: 
Heterophyes
Trypanosoma cruzi
Trypanosoma brucei
Haplorchis sp.
A

Trypanosoma brucei

81
Q

These parasites have obligate intracellular stages except: Entamoeba histolytica, Cryptosporidium parvum, Plasmodium falciparum, Leishmania sp.

A

Entamoeba histolytica

82
Q

The species of ameba which can cause keratitis is

A

Acanthameba

83
Q

In the circumoval precipitin test (COPT) the specimen to be collected from the patient is

A

whole blood

84
Q

The stage of the filaria parasite which is responsible for chronic deforming disease is

A

Adult

85
Q

Man is an accidental host of the ff except: Raillietina garissoni, Dipylidum caninum, Hymenolepis nana, Taenia saginata

A

Taenia saginata

86
Q

A 4-year old boy had skin lesions which showed burrowing tracks in the skin and intense itching in the affected area. Application of lindane resulted in improvement. The lesions were most probably due to

A

scabies

87
Q

The infective stage of Ascaris and Trichuris is

A

embryonated egg

88
Q

An 18 year old female complained of vaginal discharge. A smear of the discharge showed a pear-shaped flaggelated organism. This pathogen is

A

Trichomonas vaginalis

89
Q

The reduviid or kissing bugs are vectors for

A

American trypanosomiasis

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