Parasitology - Lecture 2 Flashcards
What are the two types of vectors?
mechanical and biological
What is a paratenic/transport host?
host where the parasite does not undergo any development, but in which it remains alive and infective another host
What are some examples of ways that a parasite can infect a host?
ingestion, burrow into skin, injected into skin/blood, transplacental, through milk, autoinfection
What is the size range for the average nematode?
1mm to 1m
describe the body shape of nematodes
cylindrical, elongated, tapered at both ends and bilaterally symmetrical
describe the structure of the. body wall of a nematode
consists of a cuticle, hypodermis, and body wall musculature
List some cuticular structures
ridges, striations, alae, spines, setae, etc.
What are the Orders of Subclass Secernentea
- Rhabditida 2. Strongylida 3. Ascarida 4. Oxyurida 5. Spirurida
What are the general features of order Rhabditida?
- small, transparent - oesophagus composed of corpus, isthmus and bulb - species make transition from free-living to parasitic
What two families are under Order Rhabditida?
- Family Rhabditidae 2. Family Strongyloididae
What are the hosts of Rhabditis strongyloides?
dogs, ox, sheep
What is the host location of Rhabditis strongyloides?
skin
Describe the lifecycle type of Rhabditis strongyloides?
normally freeliving, but become parasitic when animals are housed in wet/ soiled bedding
What is the common name of genus Strongyloides (Family Strongyloididae)?
thread worms
What family is the genus strongyloides?
Family Strongyloididae
What are the hosts of genus strongyloides?
sheep, cattle, pigs, dogs, horses, humans, etc.
What is the location in the host of genus strongyloides?
small intestine. occasionally in the respiratory, pancreatic or biliary system
What is the host and location of Strongyloides papillosus?
ruminants, small intestine
What is the host and location of Strongyloides vituli?
cattle, small intestine
What is the host and location of Strongyloides ransomi?
pigs, small intestine
What is the host and location of Strongyloides westeri?
horses, small intestine
What is the host and location of Strongyloides stercoralis?
dogs, cats and humans. small intestine
What is the host and location of Strongyloides felis?
cats. small intestine
What is the host and location of Strongyloides fuelleborni?
primates, small intestine
