Chapter 13

Question 1

What kind of animals do Branchiura parasitize, what type of parasites are they

Answer 1

ectoparasites, fish

Question 2

What order do lice belong to

Answer 2

phthiraptera

Question 3

What species of lice parasitize humans and what are their common names

Answer 3

P. humanus humanus body louce
P humanus capitis head louse
Phthirus pubis-crab louse/pubic lice

Question 4

What are the life cycle stage of lice

Answer 4

eggs-nits
nymphs
adults

Question 5

Where are body louse found? on humans and fomites

Answer 5

humanus humanus

clothing, eggs cemented onto fibers

Question 6

How many eggs do F body louse lay

Answer 6

9-10 per day

Question 7

What is used to get rid of body lice, what institutions tend to use this in their clothing

Answer 7

the military, permethrine

Question 8

Where are head louse found on humans

Answer 8

nits cement onto hair

neck, behind ears, hair

Question 9

What are the symptoms of head lice

Answer 9

scratching, itchiness, could lead to dermatitis or secondary infection

Question 10

Where are Phthirus pubis found

Answer 10

pubic region/ pubic lice

armpits, beards, mustaches, eyebrows and eyelashes

Question 11

How many eggs do phthirus pubis lay

Answer 11

30 in their lives

Question 12

How is Phthirus pubis spread

Answer 12

bedding, venereal transmission

Question 13

What other name does phthirus pubis have

Answer 13

crabs/ crab louse

Question 14

What diseases can lice vector

Answer 14

Typhus- Rickettsia prowazekii
Trench fever- also Rickettsia and pediculus humanus humanus
Relapsing fever- Borrelia recurrentis

Question 15

What is use to control lice

Answer 15

DDT, permethrin, hygiene, washing clothes with heat

Question 16

What is the scientific name for bed bugs

Answer 16

cimex lectularuis

Question 17

What do chronic infestations of bedbugs cause

Answer 17

loss of sleep, sores, iron and Hg deficiency

Question 18

What is the scientific name for Kissing bugs

Answer 18

Reduviidae

Question 19

What disease and parasite do kissing bugs vector

Answer 19

Trypanosoma cruzi-chagas disease

Question 20

What kind of mouthparts do fleas have

Answer 20

piercing-sucking mouthparts

Question 21

What is the scientific name for human fleas, what else does it infect

Answer 21

Pulex irritans, dogs, pigs, squirrels

Question 22

What are the scientific names for rat and cat fleas

Answer 22

rat-Xenopsylla cheopis

cat-Ctenocephalides felis

Question 23

What is the scientific name for Jigger/ Chiggoe fleas

Answer 23

Tunga penetrans

Question 24

What do Jigger fleas cause in humans

Answer 24

penetrates skin often feet, extreme irritation, itching, pain, inflammation, secondary infection, requires surgical removal

Question 25

What fleas caused the plague/ black death

Answer 25

plague/ black death- Yersinia pestis

Question 26

Explain what causes the plague to occur

Answer 26

bacterium that release toxins

Question 27

What flea vectors Typhys, what is the reservior animal, what is the parasite name

Answer 27

Xenopyslla cheopis, Rickettsia typhi, rats

Question 28

Explain how Typhus spreads

Answer 28

organisms enters human blood when rat feces are scratched into a flea bite wound or breaks of skin,

Question 29

What arthropod is responsible for the most deaths every year

Answer 29

diptera-flies, millions of deaths

Question 30

What disease do Sand Flies cause, what are the scientific names for it

Answer 30

Leishmania, Phlebotomus and Lutzomyia

Question 31

What diseases do culex mosquitoes cause

Answer 31

culex- western equine encephalitis | culex pipiens- Dirofilaria immitis, wuchereria bancrofti

Question 32

What are the 3 mosquito genera of most medical importance

Answer 32

anopheles aedes culex

Question 33

What diseases do Aedes mosquitos cuase

Answer 33

Aedes aegypti-yellow fever, dengue fever

Question 34

What diseases do anopheles mosquitos cause

Answer 34

malaria. plasmodium parasite

Question 35

What diseases do Black flies. deer flies and tsetse flies cause

Answer 35

black flies- onchocerca volvulus deer flies- Loa loa Teste flies- Sleeping sickness T brucei

Question 36

what is Myiasis, how does it occur

Answer 36

infestation of fly larvae, flies deposit eggs onto skin which burrow and penetrate wounds