Parasitology Practical Two (Nematodes)

Trichuris trichiura is a

whipworm

Trichuris trichiura: Two requirements to become serious health problems

Poor sanitation, warm/wet/shady environment

An operculum is

A soft spot in the egg for stylet to puncture

Trichuris trichiura: D. host and I. host

D: Humans I: None

Trichuris trichiura: location

Colon

Trichuris trichiura: Infective stage

Embryonated eggs

Trichuris trichiura: Disease

Trichuriasis

Trichinella spiralis is a

Pork Worm

A nurse cell is

complex of larva to aid in survival making it similar to a virus as the larva hide inside cells to avid immune system

Trichinella spiralis: D. hosts and I. host

D: rats and pigs I: same

Trichinella spiralis: location

Large intestine and muscles

Trichinella spiralis: Infective stage

Encysted larva

Trichinella spiralis: disease

Trichinosis

Ancylostoma spp. are

Intestinal hookworms

Ancylostoma spp. male identifying feature(s)

Copulatory bursa at posterior end

What are cutaneous larval migrans

larvae migrate through skin

Ancylostoma spp. : Hosts

D: Humans and dogs I: none

Ancylostoma spp. Location

Small intestine

Ancylostoma spp. Infective stage

Filariform larvae

Ancylostoma spp. Disease

Hookworm disease

Ascaris lumbricoides is a

Roundworm

Ascaris lumbricoides: What is used to identify the male?

Hooked tail

Ascaris lumbricoides Hosts

D: Humans and pigs I: None

Ascaris lumbricoides Location

Small intestine and lungs

Ascaris lumbricoides Infective stage

Embryonated eggs

Ascaris lumbricoides Disease

Ascariasis

Enterobius vermicularis are

Pinworms

Enterobius vermicularis methods of diagnoses

Double sided tape in underwear or night gathering of specimens

Enterobius vermicularis Hosts

D: Humans I: None , person to person

Enterobius vermicularis Location

Lumen of cecum

Enterobius vermicularis Infective stage

Embryonated eggs

Onchocerca volvulus is a

Filarial worm

Onchocerca volvulus Hosts

D: Humans I: Black fly (Simulium)

Onchocerca volvulus Location

Subcutaneous tissue

Onchocerca volvulus Infective stage

L3s

Onchocerca volvulus Disease

River Blindness

Loa loa is a

Round worm

Loa loa Hosts

D: Humans I: Fly (Chrysops)

Loa loa Location

Subcutaneous tissue

Loa loa Infective stage

L3s

Loa loa disease

Loiasis or African eye worm

Dirofilaria immitis is a

Heartworm

Dirofilaria immitis Hosts

D: Dogs (Canines) I: Mosquitos

Dirofilaria immitis Location

Heart and pulmonary arteries

Dirofilaria immitis Infective stage

L3s