PARASITOLOGY by Apollon

Trophozoite

The motile, reproducing stage, feeding stage of the Protozoa is

Entamoeba

Has a chromatid bodies in the cyst stage

E. histolytica

Amebiasis is caused by

Liver

Organ of the body is most often involved in extra-intestinal amebiasis

E. hartmanii

True ameba

Cyst

Amebae that inhabits the gastrointestinal tract of man are nonmotile, nonfeeding, and infective during stage?

1

Mature cyst of E. polecki have how many nuclei?

E. coli

Has cysts with chromatid bodies that have two pointed ends or that can be round, trinagular or oval?

E. histolytica

Trophozoite, when acting as a pathogen, is likely to ingest red blood cells of the host?

Size

Point of differentiation between Entamoeba histolytica and E. hartmanni

Four

The mature cysts of Entamoeba histolytica has how many nuclie?

Amebae

Failure to find bacteria in purulent spinal fluid should alert one to find the possibility of an infection with

I. butschlii

Distinguished by the possession of achromatic granules surrounding its karyosomal chromatin?

A. castellanii

Have a double-walled, wrinkled cyst form

I. butschlii

A cyst that possesses a single nucleus and a large glycogen vacuole that stains deeply with iodine belong to

Acanthopods

Some amebae have spiny, hyaline extensions called

H & E , wright stain

Best staining procedures for species of Naegleria and Acanthamoeba

Nasal mucosa

Amebae inhabiting the central nervous system enter the body through the

cerebrospinal fluid

Acanthamoeba and naegleria usually found

N. Fowleri

The tropozoite whose karyosomal chromatin appears as a rosette of 4-6 granules is

Blastocytis hominis

Mistaken for cysts of amebae

pear-shaped

Intestinal flagellates are usually which shape

Ventral sucking disk-trophozoite

Pathognomic for G. lamblia and the stage it is found in

Trichomonas & Trypanosoma

Protozoa have an undulating membrane

Neither has a cyst form

What does D. fragilis have in common with T. vaginalis

Giardia

Flagellate can be a pathogen of the small intestine

G. lamblia

Intestinal flagellate trophozoite has a sucking disc, 2 nuclei, 8 flagella, and an axostyle

Bacillary dysentry

Red and white blood cells in stool specimens are characteristic of

T. vaginalis

A pear shaped flagellate with jerky motility that is found in a urine specimen is identified as

2 nuclie

Eighty percent of the trophozoite of D. fragilis have

Giardia

The only bilaterally symmetricl protozoan

Leishmanial

Is the intracellular form of blood and tissue flagellates

Trypanosoma

Is the cause of African sleeping sickness

Tsetse fly (Glossina)

Is the vector of African sleeping sickness

Cruzi

Species of Trypanosoma is the cause of Chagas' Disease

Posteriorly from the kintoplast

The extracellular form of Trypanosoma is a slender organism characterised by an undulating membrane and a free flagellum that arises

Bite of reduvid bug

Trypanosoma cruzi transmitted

Trypanosoma cruzi

A chagoma is a lesion seen in infections with

L. donovani

Organism is the cause of kala-azar

Bone marrow

Is the laboratory diagnosis of L. donovani, which is the preferred specimen in which to find Leihman-Donovan bodies

Acquired by accident by man, since in customarily infects swine

A very large cyst whose double call encloses a ciliated organism with one visible nuclei would be

B. coli

Which of the following is the only ciliate that is pathogenic in humans

Cilia

Structure used for motility of Balantidium coli

Micronucleus

Nucleus in the trophozoite of Balantidium coli is the reproductive one

Same size organisms

Conjugation of trophozoite of Balantidium coli never occurs

Female Anopheles mosquito

Definitive host (vector) to Plasmodium

P. vivax

Malarial organism presents as pale, very ameboid ring trophozoites, infecting a large pale red blood cell with dots of hemoglobin

P. vivax

Malarial organisms preferentially invades reticulocytes

P. malariae

Malarial organism whose schizont resembles a "fruit pie" in which the merozoite form a rosette around the malarial pigment

P. malariae

Malarial organism characteristically has a band form trophozoite stretching across the red blood cell

Shape

The gametocyte of Plasmodium falciparum can be differentiated from that of other malarial species

Malariae

Type of Malaria can Ziemanns stippling be found

Falciparum

Type of Malaria can Maurers dots be found

P. falciparum

Malarial organism features ring trophozoites that have double chromatin dots, applique forms and often have multiple parasites in the infected red blood cells.

P. ovale

Malarial organism has large, coarse, red dots within a large, pale red blood cell with fimbriated edges

Sporogony

The sexual reproduction cycle in Plasmodium and Coccidia is

Gametocyte

Is the infective stage of the malarial parasite to the vector

Sporozoites

Is the infective stage of the malarial parasite to humans

Malariae

Which type of malaria is there synchronised rupture of the red blood cell every 72 hours

Black water fever

Falciparum malaria, there may be a sudden massive intravascular hemolysis producing hemoglobinuria

Hb-SS

What hemoglobin is incompatible with malaria parasite survival

Xenodiagnosis

What is the name of the laboratory test that allows laboratory-bred reduviid bugs to feed on patients suspected of having Chagas disease

Bite of ticks & blood tranfusion

Humans are infected with Babesia by

Leave at room temperature

If immature oocyst of Isospora belli are found in stool specimens from infected humans, what should be done with the specimen for identification

Oocyst

What stage of Isospora is infective to humans

Sporoblast

Isospora belli immature oocyst contains

Sporozoites

Infective oocyst of Isospora belli contain

Titer of toxoplasma antibodies

The demonstration of retinochoroiditis and cerebral calcifications in a newborn would result in which of these laboratory request

Cat

What is both the definitive and intermediate host of Toxoplasma gondii

Crescent

The appearance of Toxoplasma gondii in tissue fluids of man

Toxoplasma loses its affinity for methylene blue dye

What constitutes a positive result in the Sabin-Feldman dye test

Sheathers sugar flotation

Which of the following test is used for the detection of Cryptosporidium

Cryptosporidium

Parasites that is associated with AIDS

Paragonimus westermani

Which operculated ovum contains a miracidium, and can appear in sputum, often accompanied by blood and Charcot-Leyden crystals

Schistosoma mansoni & Schistosoma japonicum

Schistosome eggs may be recovers in rectal biopsy

Scolex

Scientific name of t head of a tape worm

Trematodes

Worms have an oral and ventral shaped sucker in the adult stage

Flukes & Tapeworms

Hermaphroditic

Snail

First intermediate host of the flukes

Blood flukes

The common names for the schistosomes

Chinese liver fluke

What is the common name for Clonorchis sinensis

Cercariae minus tail

What is a schistosomule

T. saginata

The beef tapeworm is the common name for

T. saginata

Which tapeworm proglottid makes its way across the fecal specimen by doubling movements, and is seen under the microscope to have numerous uterine branches (more than 15) resembling those of a tree

Beef tapeworm

Which of the following has an unarmed scolex

T. solium

Which species of Taenia has 7 to 12 uterine branches

Taenia

A hexacanth embryo enclosed in a radially striated shell belongs to the genus

Taeniasis solium

Which tape worm infection has to be treated with great care so that man does not acquire the larval infection

H. diminuta

A bile stained egg that is 75 microns at its greatest diameter and contains a hexacanth embryo that lacks polar knobs or filaments is that of

H. nana

The dwarf tapeworm ins another name for

Dogs

The eggs of Echinococcus granulosus are found in the feces of

Hydatid cyst

Which of the following is found in the intermediate host of Echinococcus granulosus

E. granulosus

Hydatid cyst infection of man is due to a larva of the tapeworm

Copepod

The first intermediate host of Diphyllobothrium latum is

Fresh water fish

The second intermediate host of Diphyllobothrium latum are

Plerocercoid

What is the infective stage of the broad fish tapeworm to humans

D. latum

The eggs of this tape worm are developed and have an operculum at one end and a small abopercular knob at the other end. The tape worm is

D. latum

In some individuals, particularly those of Scandinavian extraction, this worm can cause megaloblastic anemia

Blood flukes

Which of the following worms have separate sexes

Dorsally curved posterior

The male round worm is differentiated from the female roundworm by its