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parasitology exam 1
| Question | Answer |
|---|---|
| macroscopic exam | consistency, color, elements, look for visible worms |
| microscopic exam | wet mount with fresh or formalin preserved specimen |
| vaspar consists of | 1/2 vasoline and 1/2 paraffin |
| how long should microscopic exam last | at least 20 mins, examine entire slide |
| low power is used for | large helminth eggs or larvae |
| high power is used for | smaller parasites and larger helminth eggs and larvae |
| flotation | uses zinc sulfide solution with a higher specific gravity to float the parasite to the surface |
| sedimentation | uses a solution with a lower specific gravity to |
| wheatley's trichrome stain colors cytoplasm and nuclear material what color | cytoplasm is greenish and nuclear material is dark bluish- black to purplish-red |
| cellophane/ scotch tape procedure is used to recover | pinworm eggs |
| positive occult blood test | blue color |
| stimulation of host tissue reaction | encapsulation, eosinophilia, erythropoiesis, new ducts in the liver |
| how many specimens to ID specimen | 2-3 |
| trichrome stain IDs | intestinal parasites |
| blood smear for | malaria |
| nematoda typically infests man by | ingestion of ova, penetration of skin, insect vector transmission |
| Enterobuiusm vermicularis | pinworm |
| Trichuris trichiura | whipworm |
| Ascaris lumbricoides | large intestinal roundworm |
| necator americanus | new world hookworm |
| ancylostoma duodenale | old world hookworm |
| strongyloides stercoralis | threadworm |
| dracunculus medinesis | guinea worm |
| trichanella spiralis is associated with | undercooked pork |
| wucheria bancrofti | bancroft's filaria |
| brugia malayi | malayan filaria |
| loa loa | eyeworm |
| onchocerca vulvulus | blinding filaria |
| Mansonella ozzardi | nonpathogen, no sheath, no nuclei in tip of tail |
| Mansonella perstans | nonpathogen, no sheath, no nuclei in tip of tail |
| Enterobuiusm vermicularis is associated with | pruritis |
| enterobuiuism vermicularis disease name | enterobiasis or oxyuriasis |
| trichuris trichura disease name | trichuriasis |
| trichuris trichura is associated with | poor sanitation |
| heavy infections of which parasites can lead to hypochromic microcytic anemia? | necator americanus and ancylostoma duodenale |
| ascaris lumbriodes disease names | ascariasis, large intestinal/ roundworm infection |
| strongyloides stercoralis disease names | strongyloidiasis, threadworm infection |
| strongyloides stercoralis is endemic in | our areas of the USA |
| rhabditiform | non infective, feeding, hourglass shaped, esophagus short buccal cavity, |
| filariform | infective, non feeding, sheathed, long and slender esophagus |
| which parasite has hookworm like eggs? | strongyloides stercoralis |
| dracunculus medinesis disease name | localized subcutaneous ulcers |
| which parasite becomes encysted and calcified in muscle | trichanella spiralis |
| wucheria bancrofti disease name | elephantiasis |
| brugia malayi disease name | elephantiasis |
| loa loa disease name | calabar swelling |
| loa loa periodicity | diurnal |
| onchocerca volvus disease name | river blindness |
| mansonella ozzardi | nonpathogen, no sheath, no nuclei in tip of tail |
| mansonella perstans | nonpathogen, no sheath, no nuclei in tip of tail |
| which parasite does not have a male? | strongyloides stercoralis |
| what parasite is associated with autoreinfection? | strongyloides stercoralis |
| how to determine strongyloides stercoralis infection? | ID rhabditiform larvae in stool |
Created by:
kingsleya27