Test 3 Study Guide Flashcards
Turbellaria
free-living flatworms
Most of the symbionts of Turbellarians are commensals
Cestodes (cestoidea)
tapeworms
Monogenetic trematodes (monogenoidea)
Monogenes are ectoparasites of vertebrates, including fishes.
Digenetic trematodes
endoparasitic flukes
Enoplean nematodes
Ancestral group of nematodes.
Consists of Trichuris trichula (human whipworm) which causes trichuriasis and trichinella.
Chromadorean nematodes
Order Rhabditida
Parasitic nematodes
Consists of ascaris, enterobius (human pinworm), necator, wuchereria, and onchocerca.
Drug for platyhelminths
praziquantel
Drugs for nematodes
Mebendazole and albendazole.
Diphyllobothrium
largest tapeworms
Taenia sp. (species, disease, infective stage)
T. solium & T. saginata
Causes cysticercosis
Infect: cysticerci
Echinococcus granulosus (description, disease, infective stage)
Dog tapeworm
Causes hydatid disease
Infect : cysts
Taenia sp. (symptoms)
Abdominal pain, diarrhea, headache, dizziness, and abdominal obstruction
Hymenolepis nana (name and intermediate host)
the human dwarf tapeworm Intermediate host (beetle)
Schistosoma sp. (species, disease, infective stage, intermediate host)
S. mansoni, S. haematobium, S. japonicum
Schistosomiasis
Infect: cercariae
Intermediate host: snail
Intestinal schistosomiasis (and where)
S. mansoni (veins of large intestine)
S. japonicum (veins of small intestine)
Urinary schistosomiasis
S. haematobium
Fasciola hepatica (description, intermediate host, infective stage)
Sheep and cattle parasite
Intermediate host: snail
Infect: metacercariae
Trichinellida (species)
Trichuris trichuris
Trinchinella spiralis
Trichuris trichuris (description, disease, insert, infect)
whip worms
Trichuriasis
Ingestion
Embryonated eggs
Trichuris trichuris (symptoms, diagnosis)
Mucosal hemorrhage
Retardation
Rectum prolapse
Stool samples
Colonoscopy
Trichinella Spiralis (description, disease, insert, infect)
Parasitic roundworms
Trichinosis
Ingestion
Encysted larva
Trichinella Spiralis (host, symptoms)
Human dead-end host
Damaged blood vessels
Necrosis
Strongyloides (species, disease)
S. fuelleborni and S. stercoralis
Strongyloidiasis
S. stercoralis (insert, infect, symptoms, diagnosis)
Penetration or ingestion
Filariform larvae J3
To the lungs
Localized burning sensation/ abdominal pain
Rash
Stool sample
ELISA and PCR
S. fuelleborni (insert, infect, symptoms, diagnosis)
Penetration or ingestion
Filariform larvae J3
Localized burning sensation/ abdominal pain
Rash
Stool sample
ELISA and PCR
Hookworms (species, infect, insert, symptom)
A. duodenale & N. americana
Infect: filariform larva L3
Penetrate the skin
Creeping eruption
Ascaridomorpha (species, infect, insert, diagnosis)
A. lumbrocoides & A. suum
Infect: embryonated eggs
Ingestion
Diagnostic stage is fertilized & unfertilized eggs.
Toxicara (species, disease, infect, host)
T. canis & T. cati
Toxicariasis
Infect: L3 larva
Human accidental host
Visceral Larva Migrans (VLM)
Pinworms/Oxyuridomorpha (species, infect, diagnosis)
Enterobius vermicularis
Light, blown by wind.
Female places eggs on the outside of the anus.
Infect: Embryonated eggs
Cellophane tape against a wooden applicator on the perianal skin.
Filarial worms (species, disease, infect, diagnosis, vectors)
W. bancrofti, B. malayi and B. timori
Lymphatic filariasis: elephantiasis
Infect: L3 larva
Microfilaria diagnosis
Vectors: anopheles, aedes, culex, ochleretatus, and mansonia
Onchocerca volvulus (disease, description, diagnosis, infect, symptoms)
Onchocerciasis
River blindness
Near fast flowing rivers
Diagnosis: skin biopsy
Infect: L3 larva, microfilaria
Symptoms: onchocercomas
Guinea worm (species, insert, infect, condition)
Dracunculus medinensis
Ingestion of infected water
Infect: L3 larva
Infected person make contact with water.
The water must contain the crustacean intermediate host.
The water must be used for drinking.
