NOTE Flashcards
Motile, feeding stage of protozoa:
TROPHOZOITE
Amoeba with chromatoid bodies in the cyst stage:
ENTAMOEBA
Amoebiasis
ENTAMOEBA HISTOLYTICA
Organ of the body most often involved in extraintestinal amoebiasis:
LIVER
True amoeba:
GENUS ENTAMOEBA
Nonmotile, nonfeeding and infective stage of amoeba:
CYST
Mature cyst of Entamoeba polecki:
ONE (1) NUCLEUS
Amoeba cyst with chromatoid bodies that have two pointed ends or that can be round, triangular or oval:
ENTAMOEBA COLI
Point of differentiation between E. histolytica and E. hartmanni:
SIZE
Mature cyst of E. histolytica:
FOUR (4) NUCLEI
Failure to find bacteria in purulent spinal fluid:
POSSIBILITY OF INFECTION WITH AMOEBA
Achromatic granules surrounding its karyosomal chromatin:
IODAMOEBA BUTSCHLII
Double-walled, wrinkled cyst form:
ACANTHAMOEBA CASTELLANII
Cyst that possess a single nucleus and a large glycogen vacuole that stains deeply with iodine:
IODAMOEBA BUTSCHLII
Spiny, hyaline extensions of some amoeba:
ACANTHOPODS
Staining procedures for species of Naegleria and Acanthamoeba:
H AND E STAIN, WRIGHT’S STAIN
Amoeba inhabiting the CNS enter the body:
THROUGH THE NASAL MUCOSA
Acanthamoeba and Naegleria:
USUALLY FOUND IN CSF
Trophozoite whose karyosomal chromatin appears as a rosette of 4 to 6 granules:
NAEGLERIA FOWLERI
Mistaken for cysts of amoeba:
BLASTOCYSTIS HOMINIS
Shape of the trophozoite of intestinal flagellates:
PEAR-SHAPED
Pathognomonic for Giardia lamblia:
VENTRAL SUCKING DISK IN THE TROPHOZOITE
Undulating membrane:
TRICHOMONAS AND TRYPANOSOMA
Dientamoeba fragilis and Trichomonas vaginalis:
NEITHER HAS A CYST FORM
FLAGELLATE that can be a pathogen of the small intestine:
GIARDIA
Pear-shaped flagellate with jerky motility that is found in the urine specimen:
TRICHOMONAS VAGINALIS
80% of the trophozoites of Dientamoeba fragilis:
HAVE 2 NUCLEI
Only bilaterally symmetrical protozoan:
GIARDIA
Intracellular form of blood and tissue flagellates:
LEISHMANIAL
Vector of African sleeping sickness
TSETSE FLY (GLOSSINA)
Demonstration of trypanosomes of sleeping sickness:
BLOOD, LYMPH NODE ASPIRATE AND CSF
Extracellular form of Trypanosoma, slender organism characterized by an undulating membrane and a free flagellum :
FREE FLAGELLUM ARISE POSTERIORLY FROM THE KINETOPLAST
Kala-azar:
LEISHMANIA DONOVANI
Preferred specimen to find Leishman-Donovan bodies:
BONE MARROW
Only ciliate pathogenic to man:
BALANTIDIUM COLI
Responsible for motility of Balantidium coli:
CILIA
REPRODUCTIVE nucleus of Balantidium coli:
MICRONUCLEUS
Conjugation of trophozoites of Balantidium coli:
NEVER OCCURS BETWEEN SAME SIZE ORGANISMS
Definitive host to Plasmodium:
FEMALE ANOPHELES MOSQUITO
Amoeboid ring trophozoites:
PLASMODIUM VIVAX
Preferentially invades reticulocytes:
PLASMODIUM VIVAX
Fruit pie, rosette merozoites:
PLASMODIUM MALARIAE
Band trophozoites:
PLASMODIUM MALARIAE
Plasmodium falciparum gametocytes:
DIFFERENTIATED FROM OTHERS IN TERMS OF SHAPE; crescent-shaped gametocytes
Ziemann’s stipplings:
PLASMODIUM MALARIAE
Maurer’s dots
PLASMODIUM FALCIPARUM
Double chromatin dots, applique forms, multiple parasites in infected red blood cells:
PLASMODIUM FALCIPARUM
Large, pale red cells with FIMBRIATED EDGES:
PLASMODIUM OVALE
SEXUAL reproduction cycle in Plasmodium and Coccidia:
SPOROGONY
Infective stage of malarial parasite to the vector:
GAMETOCYTES
Infective stage of malarial parasite to man:
SPOROZOITES
Synchronized rupture of RBCs every 72 hours:
PLASMODIUM MALARIAE
Sudden massive intravascular hemolysis in falciparum malaria:
BLACKWATER FEVER
Hemoglobin incompatible with malaria parasite:
HEMOGLOBIN SS
Laboratory-bred reduviid bug to feed on patients suspected of having Chagas disease:
XENODIAGNOSIS
Humans are infected with Babesia:
BITE OF TICKS, BLOOD TRANSFUSION
Done if immature oocysts of Isospora belli are found in stool from infected humans:
LEAVE AT ROOM TEMPERATURE
Stage of Isospora infective to man:
OOCYSTS
Isospora belli IMMATURE oocysts contain:
SPOROBLAST
INFECTIVE oocysts of Isospora belli contain:
SPOROZOITES
Retinochoroidtis and cerebral calcifications:
TOXOPLASMA GONDII, ANTIBODY TITER
Both definitive and intermediate host of Toxoplasma gondii:
CAT
Appearance of Toxoplasma gondii in tissue fluids of man:
CRESCENT
Positive result in the Sabin-Feldman dye test:
TOXOPLASMA LOSES ITS AFFINITY FOR METHYLENE BLUE DYE
Test for detection of Cryptosporidium:
SHEATHER’S SUGAR FLOTATION
Schistosome eggs recovered in rectal biopsy:
S. MANSONI AND S. JAPONICUM
Scientific name of the HEADof the tapeworm:
SCOLEX
Oral and ventral cupshaped sucker in the adult stage:
TREMATODES
First intermediate host of the flukes:
SNAIL
Schistosomule:
CERCARIA MINUS TAIL
Beef tapeworm:
TAENIA SAGINATA
Uterine branches >15, resembling those of a tree:
TAENIA SAGINATA
Unarmed scolex:
BEEF TAPEWORM
With 7 to 12 uterine branches:
TAENIA SOLIUM
Hexacanth embryo enclosed in a radially striated shell:
TAENIA SPP.
Tapeworm infection to be treated with great care so that man does not acquire the larval infection:
TAENIASIS SOLIUM
Bile-stained egg and contains a hexacanth embryo that LACKS POLAR KNOBS OR FILAMENTS:
HYMENOLEPIS DIMINUTA
Dwarf tapeworm: HYMENOLEPIS NANA
Rat tapeworm: H. DIMINUTA.
Eggs of Echinococcus granulosus:
FOUND IN THE FECES OF DOGS
Found in the intermediate host of E. granulosus:
HYDATID CYST
Hydatid disease:
DUE TO LARVA OF ECHINOCOCCUS GRANULOSUS
First intermediate host of Diphyllobothrium latum:
COPEPODS
Second intermediate host of Diphyllobothrium latum:
FRESHWATER FISH
Infective stage of broad fish tapeworm to man:
PLEROCERCOID LARVA
TAPEWORM egg with operculum and abopercular knob:
DIPHYLLOBOTHRIUM LATUM
Megaloblastic anemia:
DIPHYLLOBOTHRIUM LATUM
Male roundworm:
DORSALLY CURVED POSTERIOR
Demonstration of pinworm infection:
CELLOPHANE TAPE PREPARATION
Gravid female of pinworm deposits her embryonated eggs:
ON THE PERIANAL SKIN
Eggs are flattened on one side and contain a motile larva:
ENTEROBIUS VERMICULARIS
Bile-stained eggs with clear polar plugs:
WHIPWORM
NO free-living stage:
ENTEROBIUS VERMICULARIS
Trichuris trichiura infective stage to man:
EMBRYONATED EGG
Ascaris egg lacking the mammillated coat:
DECORTICATED EGG
Unholy three:
HOOKWORMS, ASCARIS AND TRICHURIS
First larval stage of nematodes:
RHABDITIFORM LARVA
Heart to lung migration:
ASCARIS, HOOKWORM, STRONGYLOIDES
Eggs of hookworms:
EMBRYO IN 2 TO 8 CELL STAGE OF CLEAVAGE, OVAL, THIN-SHELLED AND WITH A CLEAR SPACE BETWEEN SHELL AND EMBRYO
Microcytic, hypochromic anemia:
HOOKWORMS
Rhabditiform larva of the HOOKWORM:
LONG BUCCAL CAVITY EQUAL TO THE WIDTH OF THE BODY
Mode of transmission is by skin penetration:
HOOKWORMS, STRONGYLOIDES
Demonstrated as rhabditiform larva in the fecal specimen:
THREADWORM
Muscle biopsy:
TRICHINOSIS
Vivaparous nematode:
PRODUCES LIVING LARVAE
Differential characteristics of microfilariae:
PRESENCE OR ABSENCE OF SHEATH
Habitat of adult filarial worms:
LYMPHATICS AND SUBCUTANEOUS TISSUES
Pathological findings in infestations of Wuchereria:
ELEPHANTIASIS
Intermediate host of Guinea worm:
COPEPOD
Dirofilaria immitis:
DOG HEARTWORM
Dracunculus infections:
ULCERS THAT RELEASE LARVAE ON CONTACT WITH WATER
Eye worm:
LOA LOA
Cutaneous larva migrans or creeping eruption:
CAUSED BY FILARIFORM LARVAE OF ANIMAL HOOKWORMS
Causes chronic cough, pulmonary and artery obstruction but no invasion of the heart in man:
DIROFILARIA IMMITIS
Caused by ingestion of snails by man:
RAT LUNGWORM/A. CANTONENSIS
Cercarial dermatitis or swimmer’s itch :
CAUSED BY CERCARIA OF SCHISTOSOMES
BODY of a tapeworm:
STROBILA
Gravid segments of tapeworms:
FILLED WITH EGGS
Six-hooked embryo:
HEXACANTH EMBRYO
TROPHOZOITES in iodine wet stool preparation:
TROPHOZOITES ARE DESTROYED BY IODINE
CYTOPLASM of protozoan CYST in iodine wet stool preparation:
YELLOW-BROWN
CHROMATOID BODIES of protozoan cysts in iodine wet stool preparation:
DO NOT STAIN
CHROMATOID BODIES in TRICHROME stain:
BRIGHT TO RED
Preservative in trichrome staining:
POLYVINYL ALCOHOL
Ideal temperature at which to hold a fecal specimen for more than 1 hour:
REFRIGERATOR TEMPERATURE
Specific gravity of the zinc sulfate solution for the flotation method:
1.18
Blood specimen is preferred for preparing blood smears for protozoa:
FINGER PUNCTURE
Venipuncture is not recommended for: MALARIA, BABESIA, HEMOFLAGELLATES (REQUIRES FINGER-PRICK BLOOD)
MALARIA, BABESIA, HEMOFLAGELLATES (REQUIRES FINGER-PRICK BLOOD)
Detection of stippling, blood film from venipunture:
PREPARED 30 MINUTES TO 1 HOUR AFTER BEING DRAWN
Spatulate, 3 × 1 mm; no rostellum or hooklets; has 2 shallow grooves (bothria)
D.Latum
Quadrate, 1-2 mm in diameter; no rostellum or hooklets; 4 suckers
T.saginata
Quadrate, 1-mm diameter; has rostellum and hooklets; 4 suckers
T.solium
0.2-0.5 mm in diameter; has conical/retractile rostellum armed with 4-7 rows of small hooklets; 4 suckers
D.caninum
Knoblike but not usually seen; has rostellum and hooklets; 4 suckers
H.nana
Knoblike but not usually seen; has rostellum but no hooklets; 4 suckers
H.diminuta
Beta-hemolytic streptococci - distinctive buttery odor
Proteus - “chocolate cake” or “burnt chocolate” smell
P. aeruginosa - fruity or grape-like smell, corn tortilla-like odor
Burkholderia cepacia complex – dirt-like odor
Alcaligenes faecalis - fruity odor res. apples or strawberries
Chromobacterium violaceum - smell of ammonium cyanide (almond-like)
Eikenella corrodens - chlorine bleach odor
Pasteurella multocida - musty or mushroom odor
Haemophilus influenzae - mouse nest odor
Neisseria animaloris - odor resembles popcorn
Clostridium difficile - horse stable odor
Stenotrophomonas maltophilia - ammonia smell