Lecture 6-Trichinella Flashcards
(30 cards)
Phylum
Nematoda
How many hosts does it need to complete life cycle?
1
Separate sexes?
Yes
commonly known as?
pork worm
how many larval stages?
4
name the 2 cycles it can use (host)?
synanthropic and sylvatic
Synantrophic
domestic host
Sylvatic
wild host
4 species we are studying
- T. spiralis
- T. nativa
- T. nelsoni
- T. pseudospiralis
Where can you find T. spiralis?
all continents
Where can you find T. nativa?
Northern Hemisphere
Where can you find T. nelsoni?
Africa
Where can you find T. pseudospiralis?
scattered everywhere (less than T. spiralis)
Main host of T. pseudospiralis
mammals and raptor birds
Which species is freeze resistant?
T. nativa
T. spiralis major hosts
mammals
T. nativa major hosts
carnivores (lions)
T. nelsoni major hosts
hyenas and cats
Which species is highly infective to pigs?
T. spiralis
Factors affecting transmission (x7)
- many acquisition routes
- wide host range
- immunocompromised hosts
- long life span of muscle larvae
- dose
- animal husbandry practice
- climate
Where does sexual stage occur?
enteral phase (small intestine)
Where does infective stage occur?
parenteral phase (skeletal muscle)
What is the infective stage morphology?
L1
Mode of birth
ovoviviparous
