Arthropod 4 Flashcards
True or False:
All bot flies cause obligatory myiasis of various organs.
TRUE
True or False:
Bot flies are not host specific.
FALSE
High host specific and site specific
What is the rodent skin bot?
Cuterebra
Where do Cuterebra flies lay there eggs?
Along rabbit runs and rodent burrows
Where, geographically, can cuterebra be found?
Throughout North America
How do Cuterebra enter their hosts?
Through some body opening
When would you expect to see lesions of Cuterebra on a dog or cat?
August, September, October
Where are the body would cuterebra lesions most likely be?
Neck
&
Shoulders
If there are no skin lesions, what other signs could develop with cuterebra?
Respiratory signs
&
Neurological signs
Nose bots:
What are they?
Oestrinae
The sheep nasal bot fly:
What is the genus and species?
Oestrus ovis
Females of Oestrus ovis are what, viviparous, oviparous, etc?
Larviparous
Oestrus ovis:
What are the symptoms?
Chronic nasal discharge
Head shaking
Paw at head
Loss of appetite
Oestrus ovis:
What is your treatment plan?
Ivermectin, orally
Where on the body might Hypoderma lay their eggs?
Glue eggs to the hair on the legs of cattle
At what time of year would you most likely see infections with the following:
- Hypoderma lineatum?
- Hypoderma bovis?
- Hypoderma lineatum : April - June
- Hypoderma bovis : June - September
How does Hypoderma get into the body?
Eggs hatch spontaneously in less than a week and larvae penetrate the skin directly or through a hair follicle.
Hypoderma lineatum OR Hypoderma bovis:
- Larvae migrate between fascial planes of muscle and along connective tissue.
- Larve follow nerves below the skin.
- Larve accumulate in the spinal canal.
- Larvae accumulate in the submucosa of the esophagus.
- Larvae migrate around the epideral space.
- Larvae form a hole in the skin surface.
- Hypoderma lineatum
- Hypoderma bovis
- Hypoderma bovis
- Hypoderma lineatum
- Hypoderma bovis
- Hypoderma bovis
Hypodermatinae:
- What is your medical treatment plan?
- When during the year will you treat?
- Ivermectin; Organophosphates
- Treat at the end of fly season (late August) prior to larva reaching the esophagus or spinal canal
The stomach bots:
What is the genus?
Gasterophilus spp.
Gasterophilus:
Obligate or falcultative parasites?
Obligate
Explain the life cycle of Gasterophilinae:
- The first and second stage larvae spend one month in the oral cavity
- They proceed to the stomach and duodenum where they remain for 9-10 months
- They ultimately pass out in feces to pupate in the ground
- Life cycle encompasses about 1 year
Where does Gasterophilus intestinalis lay their eggs?
Deposit eggs on the hairs of the forelegs and shoulders
Gastrophilus intestinalis:
What causes the eggs to hatch?
A sudden rise in temperature, moisture, and friction associated with grooming
Throat bot fly:
What is the genus and specis?
Gastrophilus nasalis
Gastrophilus nasalis:
Where does it lay its eggs?
Hairs of the intermandibular space
Lip bot fly:
What is the genus and species?
Gastrophilus hemorrhoidalis
Gastrophilus hemorrhoidalis:
Where does it deposit its eggs?
Hairs that adjoin the lips
Gastrerophilinae:
- What is your medical treatment plan?
- Which life cycle stage is this medication active against?
- Ivermectin
- Larval stages
