Module 9a Flies Flashcards Preview

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Flashcards in Module 9a Flies Deck (28):
1

general fly info

large and diverse order of highly evolved insects
not much medical importance
greatest impact on humans and animals

2

Fly order and meaning

Order Diptera
"two-wings"

3

Fly suborders

1. Suborder Nematocera: long, threadlike antennae
2. Suborder Brachycera: shorter antennae

4

general fly anatomy

wings arise from mesothorax
halteres (knob-like modified metathoracic second wings)
well developed compound eyes

5

fly life history

holometabolous (egg - larva - pupa - adult)
various types of birth (oviparous, larviparous, pupiparous)
various feeding strategies (autogenous and anautogenous)

6

oviparous definition

usual method of reproduction
laying eggs that later hatch into larvae

7

larviparous definition

larvae hatch internally, female lays early install larvae

8

pupiparous definition

larva retained in fly "uterus" until ready to pupate

9

autogenous definition

females of many species can produce a batch of eggs without flood meal

10

anautogenous

must have blood meal before maturing a batch of eggs

11

sand flies and moth flies family

Family Psychodidae

12

general family Psychodidae info

suborder Nematocera (long antennae)
very small and hairy
adults occur in moist, shady places

13

subfamily Psychodinae

Moth Flies
non-biting, found in sewer systems, not medically important

14

subfamily Phelobotminae

Sand Flies
major vectors for variety of diseases

15

sand fly anatomy

humped thorax
long, stilt-like legs
short proboscis
females: telmophages
males: can't pierce skin so feed off female's wounds

16

Bartonellosis

pathogen: Bartonella bacilliformis
vector: Sand fly
disease symptoms:
1. oroya fever: acute, anemia (can be fatal)
2. Peruvian warts: nodular eruptions on face/limbs (usually not fatal)

17

leishmaniasis

complex of diseases that depends on species
host: humans
vector: sand flies (phelobotomus and lutzomyia spp)
pathogen: Leishmania spp

18

leishmaniasis transmission cycle

1. pathogen ingested w/ blood meal by sand fly
2. multiplies in hindgut
3.migrates to midgut and into esophagus
4. found in mouthparts and are introduced to human during feeding

19

cutaneous leishmaniasis

initial lesion at bite site
new regions are affected as sore spreads

20

mucocutaneous/nasopharyngeal Leishmaniasis

causes disfiguring damage to face
lesions of mucous membranes of nose, mouth, and pharynx

21

visceral leishmaniasis

"kala-azar" or "dumdum fever"
inconspicuous lesion at bite site
parasite in circulatory system
chronic fever, wasting, distended abdomen

22

control of sand fly

leishmaniasis not of such importance to consider widespread vector control
insect repellant, protective clothing, insect nets

23

horse and deer flies taxonomy and characteristics

family Tabanidae
large bodies
colorful eyes (sexually dimorphic)
antennae extend anteriorly
veins in wings form V

24

sexually dimorphism of horse and deer flies

males: eyes touch and don't feed on blood
females: scissor-like mouthparts, telmophages, anautogenous (need blood meal)

25

horse flies characteristics

clear wings, large bodies
serious nuisance to livestock
not major vectors of human diseases
important genera: Tabanus and Hybomitra

26

deer flies characteristics

banded wings, smaller bodies
frequently attack humans
important genus: Chrysops
vector diseases: Loiasis and Tularemia

27

tularemia

Rabbit Fever or Deerfly Fever
bacteria: Francisella tularensis
vector: Chrysops discalis (deer fly)
also transmitted by rabbits, ingestion/inhalation, or ticks
disease: lesions with pink pit, sepsis

28

loiasis

parasite: loa loa (African eye worm)
vector: Chrysops spp
disease: calaber swellings, pain from nematode moving in the eye or nose, throughout whole body