Chapter 13 Flashcards
What kind of animals do Branchiura parasitize, what type of parasites are they
ectoparasites, fish
What order do lice belong to
phthiraptera
What species of lice parasitize humans and what are their common names
P. humanus humanus body louce
P humanus capitis head louse
Phthirus pubis-crab louse/pubic lice
What are the life cycle stage of lice
eggs-nits
nymphs
adults
Where are body louse found? on humans and fomites
humanus humanus
clothing, eggs cemented onto fibers
How many eggs do F body louse lay
9-10 per day
What is used to get rid of body lice, what institutions tend to use this in their clothing
the military, permethrine
Where are head louse found on humans
nits cement onto hair
neck, behind ears, hair
What are the symptoms of head lice
scratching, itchiness, could lead to dermatitis or secondary infection
Where are Phthirus pubis found
pubic region/ pubic lice
armpits, beards, mustaches, eyebrows and eyelashes
How many eggs do phthirus pubis lay
30 in their lives
How is Phthirus pubis spread
bedding, venereal transmission
What other name does phthirus pubis have
crabs/ crab louse
What diseases can lice vector
Typhus- Rickettsia prowazekii
Trench fever- also Rickettsia and pediculus humanus humanus
Relapsing fever- Borrelia recurrentis
What is use to control lice
DDT, permethrin, hygiene, washing clothes with heat
What is the scientific name for bed bugs
cimex lectularuis
What do chronic infestations of bedbugs cause
loss of sleep, sores, iron and Hg deficiency
What is the scientific name for Kissing bugs
Reduviidae
What disease and parasite do kissing bugs vector
Trypanosoma cruzi-chagas disease
What kind of mouthparts do fleas have
piercing-sucking mouthparts
What is the scientific name for human fleas, what else does it infect
Pulex irritans, dogs, pigs, squirrels
What are the scientific names for rat and cat fleas
rat-Xenopsylla cheopis
cat-Ctenocephalides felis
What is the scientific name for Jigger/ Chiggoe fleas
Tunga penetrans
What do Jigger fleas cause in humans
penetrates skin often feet, extreme irritation, itching, pain, inflammation, secondary infection, requires surgical removal
What fleas caused the plague/ black death
plague/ black death- Yersinia pestis
Explain what causes the plague to occur
bacterium that release toxins
What flea vectors Typhys, what is the reservior animal, what is the parasite name
Xenopyslla cheopis, Rickettsia typhi, rats
Explain how Typhus spreads
organisms enters human blood when rat feces are scratched into a flea bite wound or breaks of skin,
What arthropod is responsible for the most deaths every year
diptera-flies, millions of deaths
What disease do Sand Flies cause, what are the scientific names for it
Leishmania, Phlebotomus and Lutzomyia
What diseases do culex mosquitoes cause
culex- western equine encephalitis
culex pipiens- Dirofilaria immitis, wuchereria bancrofti
What are the 3 mosquito genera of most medical importance
anopheles
aedes
culex
What diseases do Aedes mosquitos cuase
Aedes aegypti-yellow fever, dengue fever
What diseases do anopheles mosquitos cause
malaria. plasmodium parasite
What diseases do Black flies. deer flies and tsetse flies cause
black flies- onchocerca volvulus
deer flies- Loa loa
Teste flies- Sleeping sickness T brucei
what is Myiasis, how does it occur
infestation of fly larvae, flies deposit eggs onto skin which burrow and penetrate wounds
