Parasitology Table: Nematodes Flashcards
What is the common name for Enterobius vermicularis?
pinworm
What is the infective form of Enterobius vermicularis?
embryonated egg
What is the transmission method for Enterobius vermicularis? What is the non-human host?
fecal-oral; none
What is the habitat in humans for enterobius vermicularis?
colon
What is the disease/pathology caused by Enterobius vermicularis?
mild GI symptoms; pruritis ani (scratching may lead to cellulitis)
**autoinfection may occur if eggs hatch and larvae migrate back into the colon
What is the diagnostic method for Enterobius vermicularis?
scotch-tape eggs/adults
What drugs are used for Enterobius vermicularis?
pyrantel pamoate
What is the common name for Trichuris trichiura?
whipworm
What is the infectious form for Trichuris trichiura?
embryonated egg
What is the transmission method for Trichuris trichiura? What is the non-human host?
fecal-oral; none
What is the habitat for Trichuris trichiura?
colon
rectum
What is the disease/pathology caused by Trichuris trichiura?
acute dysentery
chronic hemorrhagic colitis
rectal prolapse
What is the diagnostic method for Trichuris trichiura?
stool exam for egg
What is the medication of choice for Trichuris trichiura?
medendazole
What is the common name for Ascaris lumbricoides?
ascariasis
What is the infectious for of Ascaris lumbricoides?
embryonated egg
What is the transmission method of Ascaris lumbricoides? What is the non-human host?
fecal-oral; none
What is the habitat for Ascaris lumbricoides?
small intestine
bile ducts
What is the disease/pathology caused by Ascaris lumbricoides?
abdominal distress
intestinal obstruction
What is the diagnostic method for Ascaris lumbricoides?
stool exam for egg
eosinophilia
What is the drug of choice for Ascaris lumbricoides?
albendazole
What is the common name for Ancylostoma duodenale and Necator americanus?
hookworms
What is the infective form of Ancylostoma duodenale and Necator americanus?
3rd stage filariform larva
What is the method of transmission of Ancylostoma duodenale and Necator americanus? What is the non-human host?
skin contact; none
What is the habitat for Ancylostoma duodenale and Necator americanus?
small intestine
What is the disease/pathology caused by Ancylostoma duodenale and Necator americanus?
anemia **like 7 mil L of blood lost per day
GI symptoms
edema
ascites
What is the diagnostic method for Ancylostoma duodenale and Necator americanus?
stool exam for egg
What is the drug of choice for hookworms?
mebendazole, albendazole
iron supplementation
What is the common name for Strongyloides stercoralis?
strongyloidiasis
What is the infectious form of Strongyloides stercoralis?
3rd stage filariform larva
**parasitic and free-living form in its life cycle
What is the method of transmission for Strongyloides stercoralis? What is the non-human host?
skin contact; reservoirs
What is the habitat for Strongyloides stercoralis?
small intestine
systemic
What is the disease/pathology caused by Strongyloides stercoralis?
GI symptoms
watery, mucous-laden diarrhea
autoinfection/hyperinfection
What is the diagnostic method for Strongyloides stercoralis?
stool exam for LARVAE
eosinophilia
What is the drug of choice for Strongyloides stercoralis?
ivermectin
What is the common name for Trichinella spiralis?
trichinosis
What is the infectious form of Trichinella spiralis?
encysted larva
What is the transmission method of Trichinella spiralis? What is the non-human host? What is the habitat in humans?
uncooked meat; reservoirs; striated muscle
What is the disease/pathology caused by Trichinella spiralis?
myositis
systemic inflammation
What is the diagnostic method for Trichinella spiralis?
muscle biopsy
serology
What drugs are used to treat Trichinella spiralis?
mebendazole
corticosteroids (for muscle inflammation)
What is the common name for Wuchereria bancrofti?
lymphatic filariasis
What is the infectious form of Wuchereria bancrofti?
3rd stage filariform larva
What is the transmission method of Wuchereria bancrofti? What is the non-human host?
mosquito bite; mosquito
What is the habit for Wuchereria bancrofti?
lymphatics
blood
What is the disease/pathology caused by Wuchereria bancrofti?
lymphangitis
fever
elephantiasis
What is the diagnostic test for Wucereria bancrofti?
blood film for microfilaria
What is the drug of choice for Wuchereria bancrofti?
diethylcarbamazine
What is the common name for Onchocerca volvulus?
river blindness
What is the infectious form of Onchocerca volvulus?
3rd stage filariform larva
What is the transmission method for Onchocerca volvulus? What is the non-human host?
black fly bite; mosquito
What is the habitat for Onchocerca volvulus?
lymphatics
blood
What is the habitat for Onchocerca volvulus?
skin
lymphatics
eye (microfilaria)
What is the disease/pathology caused by Onchocerca volvulus?
lymphangitis
fever
elephantiasis
sclerosing keratitis
What is the diagnostic method for Onchocerca volvulus?
blood film for microfilaria
What is the drug of choice for Onchocerca volvulus?
ivermectin
What is the common name for Dracunculus medinensis?
Guinea worm
What is the infectious form of Dracunculus medinensis?
3rd stage filariform larva
What is the transmission method of Draculunculus medinensis? What is the non-human host?
contaminated water; copepod
What is the habitat for Draculunculus medinensis?
viscera and skin
What is the disease/pathology caused by Draculunculus medinensis?
skin ulcer/inflammation
What is the diagnostic method for Draculunculus medinensis?
identify adult female worm
What is the med of choice for Draculunculus medinensis?
mebendazole