CH 23 L4
giardiasis
more common water born disease GI
host will swallow a cyst from contaminated food or water or even hands
intestinal wall gets scared from the adhesive disk attachment it uses
cysts survive stomach acid
often asymptomatic but can cause some GI distress
2 forms- motile feeding trophozile and a dormant cyst
occurs in in developed and developing countries
treated with tinidiazole or metronidazole
oral rehydration may be needed
Cryptosporidiosis
milwakee 1993 outbreak
severe watery diarrhea
caused by cryptospordium which is an intracellular parasite that is banana
infection results from drinking contaminated water
presence of oosysts in feces is dx
prevented with proper hygiene
Amebiasis
caused by Entamoeba histolytica all 3 forms
depend on the health of the host
transmitted by consumption
majority of indivduals develop luminal amebaisis
human carriers help maintain transmission
prevent with proper hygiene and safe sex practices
Tapeworm
taneia species live worldwide where beef and pork are food
treated with one dose of niclosamide or praziqauanted
rarely surgery is required unless the intestinal tract is blocked
Pinworm
hemotodes
inteste perianal itching
caused by enterobius vermicularisis
also on skin and fingernails so people re infest themselves
dx based on identification of eggs or adult pinworms
treated with pyranal pamoate or mebendazole followed by a second treatement 2 weeks later
Anisakiasis
result from infestation by several parasitic nematudes
most commonly known as anisakis simplex parasite of marine animal
20,000 cases occur worldwide
click to edit