Phasmids 4 Flashcards
Without caudal chemoreceptors
Aphasmids
With caudal chemoreceptors
Phasmids
Angiostrongylus cantonensis
What kind of worm
Rat lungworm
Angiostrongylus cantonensis
Also known as
Parastrongylus cantonensis
Angiostrongylus cantonensis
The most common cause of
Eosinophilic meningoencephalitis
Angiostrongylus cantonensis
Incidental host
Human
Uterus cols around the blood-filled intestines
Barbers pole appearance
Angiostrongylus cantonensis
Adult
Tapering on both ends
Lacking a buccal capsule
Angiostrongylus cantonensis
Female
Posterior end is blunt horn shape
Angiostrongylus cantonensis
Male
Posterior end is bent ventrally
Angiostrongylus cantonensis
Infective in human
L2 and L3
Angiostrongylus cantonensis
Infective stage
L3
Angiostrongylus cantonensis
How many molting
2
Angiostrongylus cantonensis
Intermediate host
Snails and slugs
Angiostrongylus cantonensis
Paratenic host
Crabs
Shrimps
Angiostrongylus cantonensis
Mode of transmission
Ingestion of improperly cooked snails, slugs, prawns, fish
Angiostrongylus cantonensis
Incubation periof
1-3 weeks
Angiostrongylus cantonensis
Clinical manifestation
Eosinophilic meningitis
Ocular invasion
Angiostrongylus cantonensis
Diagnosis
Eosinophilia
CSF
Angiostrongylus cantonensis
Both eggs and larva can be identified by
Biopsy
Surgical specimens
Angiostrongylus cantonensis
Treatment
Thiobendazole
Angiostrongylus costaricensis
Egg hatch in the ileum
Angiostrongylus costaricensis
Causes
Eosinophilic enteritis
Angiostrongylus costaricensis
Mimics
Appendicitis
Gnathostoma spinigerum
Incidental host
Human
Gnathostoma spinigerum
1st intermediate host
Crustacean
Cyclops
Gnathostoma spinigerum
2nd intermediate host
Fish
Frog
Snake
Gnathostoma spinigerum
Paratenic host
Birds
Snakes
Frogs
Gnathostoma spinigerum
Definitive host
Pigs
Cats
Dogs
Wild animals
Gnathostoma spinigerum
Deposit eggs that are __________ when passed in the feces
Unembryonated
Gnathostoma spinigerum
Eggs become embryonated in
Water
Gnathostoma spinigerum
Diagnostic
Cutaneous
Ocular
Visceral
Neurological
Gnathostoma spinigerum
Mode of transmission
Ingestion of improperly cooked fish and poultry
Gnathostoma spinigerum
Clinical manifestation
Curaneous larva migrans
Migrating edema
Visceral larva migrans
Gnathostoma spinigerum
Diagnosis
Leukocytosis with high eosinophilia
Removal of ID worm
Intradermal test
Excision biopsy
Gnathostoma spinigerum
Treatment
Albendazole
Ivermectin
No DOC
Dracunculus medinensis
What kind of worm
Guinea worm
Dracunculus medinensis
Usually in
3rd world countries
Dracunculus medinensis
Definitive host
Human Wolves Horses Cows Leopards
Dracunculus medinensis
Intermediate host
Cyclops
Copepods
Dracunculus medinensis
Infective stage to human
L3
Dracunculus medinensis
Emergent worms
Severe pain
Allergic reaction
Blisters
Dracunculus medinensis
Non emergent worms
Arthritis
Cellulitis
Necrosis
Calcification of worm
Dracunculus medinensis
Mode of transmission
Drinking unfiltered water containing copepods
Dracunculus medinensis
Life cycle
Drink Copepods die release larva Male worms die, female migrate in subcu 1 year female induces blister, lower extremity Lesion contact with water, release L1 L1 ingested by a copepod 2 weeks and 2 molts Infective stage L3
Dracunculus medinensis
Clinical manifestation
Localized but incapacitating
Sterile abscess
Joint pains
Blister whitish filament
Dracunculus medinensis
Diagnosis
No serological test available
May be different before worm emerges
Dracunculus medinensis
Treatment
Thiabendazole or metronidazole
No DOC