ANSC 2060 Chapter : Parasites Part 2
Document Summary
Nematodes: 6 orders of this phylum affect ca, definitive host is the host for the adult nematode. Roundworms : host infects 3 ways, host ingests the l3 (3rd larval stage, has to be l3 to be infectious. Ingested through ground, milk, etc: free living l3 penetrates the host"s skin. L3 is injected into host by a vector (mosquito, flea, fly) Roundworms in dogs: roundworms are very stable in environment, canis. Roundworms: zoonotic potential!, visceral (abdomical organs) or ocular larval migrans in people, causes blindness, diagnosis, centrifugal fecal test, treatment, anthelimintic drugs (antiparasite, prevent with monthly preventative. Hookworms: attaches to the lining of the intestinal wall and feeds on blood a voracious bloodfeeder, transmission. Ingestion of the third-stage larvae from a contaminated environment: larval penetration of the skin and mucus membranes, and/or ingestion of the vertebrate hosts with infective larvae in their tissue, cats by eating cockroaches that contain infective larvae.
