Bovine- Musca, Stomoxys, Haematobia and Cochliomyia

Question 1

What are examples of Muscidae?

Answer 1

Musca domestica: house fly
Musca autumnalis: face fly
Stomoxys calcitrans:stablefly, biting housefly
Haematobia irritans: horn fly

Question 2

What is Musca domestica Common name?

Answer 2

house fly

Question 3

What is Musca domestica Hosts?

Answer 3

domestic animals and humans

Question 4

What is Musca domestica Identification?

Answer 4

adults 5.5-7.5 mm
light to dark grey
sticky hairs on pads of legs
mouthparts fleshy adapted to sponging

Question 5

What is Musca domestica Life cycle?

Answer 5

eggs laid in wet feces or rotting organic material

Question 6

What is Musca domestica Found?

Answer 6

anywhere on animals and humans

Question 7

What is Musca domestica Importance?

Answer 7

mechanical vectors of many disease agents

annoyance

Question 8

What is Musca domestica Life cycle?

Answer 8

potential reproductive capacity is tremendous
One male and one female in 5 months…….
191,010,000,000,000,000,000

Question 9

What is Musca autumnalis Common name?

Answer 9

face fly

Question 10

What is Musca autumnalis Preferred location on animal?

Answer 10

secretions on animal face (induce ocular and nasal discharges)
wounds

Question 11

What is Musca autumnalis Importance?

Answer 11

mechanical vector of infectious bovine keratoconjunctivitis
vector of Thelazia spp. in cattle
extremely annoying to pastured animals
causes reduced production

Question 12

What is Stomoxys calcitrans Common name?

Answer 12

stablefly,

biting housefly

Question 13

What is Stomoxys calcitrans Hosts?

Answer 13

most animals and humans

Question 14

What is Stomoxys calcitrans Identification

Answer 14

adults 5.5-7.5 mm
proboscis rigid, conspicuous and forward projecting
sits on wall head up

Question 15

What is Stomoxys calcitrans Life cycle?

Answer 15

similar to face fly but prefers decaying organic materials

feeds on blood 1-2 times a day

Question 16

What is Stomoxys calcitrans Found?

Answer 16

anywhere on cattle

Question 17

What is Stomoxys calcitrans Pathogenesis, lesions, clinical signs?

Answer 17

attack cattle -- feeding is 3 min which is often interrupted
painful bites
transmits disease organisms
mechanical and biological vector
annoyance

Question 18

What is Musca spp and S. calcitrans Treatment and prevention / Control?

Answer 18

screens
sanitation to reduce breeding sites
insecticides to manure heaps
baits
IPM
animal treatments (insecticides / repellents)

Question 19

What is Haematobia irritans Common name?

Answer 19

horn fly

Question 20

What is Haematobia irritans Hosts?

Answer 20

cattle

Question 21

What is Haematobia irritans Identification?

Answer 21

adults 4 mm
smallest of bloodsucking muscids
distinguish from stable fly being ½ size and shorter proboscis

Question 22

What is Haematobia irritans Life cycle?

Answer 22

remain on hosts except when females lay eggs in fresh feces

overwinter (diapause)

Question 23

What is Haematobia irritans Site(s) of infection?

Answer 23

back, sides and abdomen

cluster around horns when not feeding

Question 24

What is Haematobia irritans Pathogenesis, lesions, clinical signs?

Answer 24

feed in thousands
causes intense irritation
impair milk production and weight gains
transmit cattle helminths
more than 200 flies leads to economic losses

Question 25

What is Haematobia irritans Treatment and prevention?

Answer 25

apply to host since fly remains on host most of time | insecticide resistance

Question 26

What is Myiasis?

Answer 26

The infestation of living animals with the larvae of dipteran flies Facultative: optional (calliphorids) Obligatory: can not survive without host (oestrids) Cutaneous (Lucilia) Nasal (Oestrus) Somatic (Hypoderma; Cuterebra)

Question 27

What is Cutaneous myiasis – “fly strike”?

Answer 27

Maggots causing fly strike belong to Calliphoridae or Sarcophagidae Family Calliphoridae include the New World screwworm and the Old World screwworm Calliphoridae are the blow flies Sarcophagidae are the flesh flies

Question 28

What is Cochliomyia hominivorax Common name?

Answer 28

screwworm

Question 29

What is Cochliomyia hominivorax Hosts?

Answer 29

livestock

Question 30

What is Cochliomyia hominivorax Identification?

Answer 30

10 mm, bluish green flies stripes on thorax orange brown eyes

Question 31

What is Cochliomyia hominivorax Life cycle?

Answer 31

larvae feed invasively on living tissue

Question 32

What is Cochliomyia hominivorax Site(s) of infection?

Answer 32

eggs laid on fresh, uninfected wounds

Question 33

What is Cochliomyia hominivorax Pathogenesis, lesions, clinical signs?

Answer 33

wounds attract female flies causes “blowfly strike” foul smelling lesion rapidly leads to death of host

Question 34

What is Cochliomyia hominivorax Diagnosis?

Answer 34

recognition of maggots in lesions | must report to vet authorities immediately

Question 35

What is Cochliomyia hominivorax Treatment and prevention?

Answer 35

treat wounds | releasing sterile males