PORTALS OF ENTRY, EXIT, AND MOT Flashcards
different portals of entry
- mouth/oral cavity
- skin
- urogenital tract
- nasal passages
- transplacental
different modes of transmission
- ingestion
- oral-anal intercourse
- larval skin penetration
- skin inoculation (vector-borne)
- sexual intercourse (venereal)
- intranasal
- vertical transmission (mother to fetus)
portal of entry and mode of transmission of most intestinal parasites
mouth/oral cavity; ingestion
portal of entry: mouth/oral cavity
mode of transmission: oral-anal intercourse
- Giardia lamblia
- Entamoeba histolytica
- C. parvum
- E. fragilis
- E. vermicularis
causative agent of gay-bowel syndrome
Giardia lamblia/Giardia duodenalis
portal of entry: skin
mode of transmission: LARVAL skin penetration
- Hookworms, S. stercoralis (filariform larva)
- Schistosoma spp. cercaria
portal of entry: skin
mode of transmission: skin inoculation (vector-borne by arthropods)
Plasmodium spp., Filariae, Leishmania spp., Treponema spp., Babesia spp.
usual vector of Leishmania spp.
Sandfly
portal of entry: urogenital tract
mode of transmission: sexual intercourse (venereal)
Trichomonas vaginalis
portal of entry: nasal passages
mode of transmission: intranasal
free living acanthamoebas (Acanthamoeba spp. and Naegleria fowleri)
portal of entry: transplacental
mode of transmission: vertical transmission (mother to fetus)
- Toxoplasma gondii
- Trypanosoma cruzii
- Plasmodium spp.
causative agent of toxoplasmosis
Toxoplasma gondii
causative agent of chagas disease
Trypanosoma cruzi
causative agent of malaria
Plasmodium spp.
autoinfection within the intestine
internal
hand to mouth autoinfection
external
examples of internal autoinfection
- Strongyloides stercoralis (rhabditiform larva -> filariform larva)
- atypical eggs of C. philippinensis
- C. parvum oocyst
- T. solium (reverse persitalsis of eggs)
mode of action of filariform larva
bubutasin ‘yung intestinal wall para makapasok sa blood stream
example of external autoinfection
- E. vermicularis
- H. nana
PORTALS OF EXIT
- anus
- mouth
- urogenital tract
- non intact skin
most common portal of exit
anus
Paragonimus westermani
- Sputum = Spit
- Stool = Swallow
Urogenital Tract
T. vaginalis
Non intact skin
D. medinensis (skin ulcers)