Please enable JavaScript.

Coggle requires JavaScript to display documents.

Parasites (Helminths (NEMATODES (filarial worms (humasn are a dfeinitive…

- - - - pinworm is the most common worm infection in the US
      - fecal/oral transmission
    - - live in small intestine
      - eggs hatch in small intestine
        
        larvae go through intestine, travel through lymph and blood to liver/heart/lungs
        
        larvae mature in liver and travel to capillarires into lungs wher etheyre coughed up and swallowed back into gut
    - - hook into intestinal wall with teeth and ingest red blood cells for nutrition
      - enter through unbroken skin, travel to gut and mature into adult and eggs pass through feces
    - - live in intestine but also make cysts in muscle with larvae which can be transmitted to humans when they eat undercooked pork
    - - humasn are a dfeinitive host with mosquito as a vector, but not a zoonoese
      - live in lymph/blood channels
      - cause elephantitis
    - - ingestion of drinking water
  - - - cause Taeniasis
      - scolex has hooks and neck is followed by ribbon like segments called proglottids
      - raw/undercooked beef/pork is transmisison of cysts
        
        can cause cysticerosis which can be found in any organa and can lead to blindness or neurological damage
      - humans carry adult forms and are definitive hosts but also can be infected with cysts so they can also be intermediate hosts
  - - - eggs come out of human's urine or feces
        
        eggs cause inflammatory damagee while adults don't really burrow through tissue
        
        go into water and penetrate and replicate in snails
        
        come out of snails in water and go into people's bloodstream/guts
- - - - normal life cycle in cats/rodents
        
        cats are definitive hosts because they house the adult form while its maturing and this is where they reproduce
        
        rodents are intermediate hosts because they house the larval/cyst form. cyst forms sually have to be eaten and digested out to pass onto definitive host
        
        dead end hosts are when intermediate hosets don't allow transmission to a new definitive host; this is humasn because even if they eat the cysts, a cat is unlikely to eat the human dead.
      - form cysts in muscle/nerve cells
  - - - transmitted by tsetse fly
      - causes trypanosomiasis, zoonosis from cows/horses
      - immune response
        
        lives in bloodsream, so combatted by antibodies
        
        if parasite evades mechanisms, can spread to the brain
    - - attaches to mucosal epithelium
      - cyst form passed in feces
      - animal reservoir in beaver