27: SA Lice & Flies

Pediculosis

Infestation with lice

Agents that lice vector

• D. caninum

• Bacteria

• Viruses

Types of lice

Anapluran (sucking) and mallophagan (chewing)

Stages of lice that are on the host

All of them

Dog lice

• Sucking: Lignonathus setosus

• Chewing: Trichodectes canis

Cat lice

Chewing: Felicola subrostratus

CS associated with pediculosis

• Pruritis, scaling

• Irritation

• ± Anemia

Diagnostics for lice

• Hx, CS, visualization

• Microscope

Why would we want to ID lice

It doesn’t change treatment, but it may change the conversation about IH

Drug class for lice treatment

Isoxazolines

Prevention for lice

Quarantine new additions

Why do we care about flies

They vector things

Fly of highest global importance

Mosquitos

Mosquito life cycle

Complex metamorphosis, requires water

Roles of mosquitos in disease

Biologic vector and mechanical vector

Prominent SA parasite that uses mosquitos as a biologic vector

D. immitis

Prominent LA parasite that uses mosquitos as a mechanical vector

A. marginale

What is required for complete, 100% heartworm prevention

HWP and mosquito repellent

Stomoxys calcitrans common name

Stable fly, kennel fly

Where does Stomoxys breed

Decaying organic matter

When do we find Stomoxys on animals

When feeding

Where do we usually see SA lesions caused by Stomoxys

Ears

Drug for Stomoxys treatment

Pyrethroids for dogs, pyrethrins for cats

Prevention for Stomoxys

Control breeding grounds and use feed through products

NWS

Cochliomyia hominivorax

Why is NWS so bad

Larvae feed on fresh tissue

Treatment for NWS

• MCL/Isoxazolines, topical or systemic

• Remove and submit for testing

• Wound sanitation

SA bot

Cuterebra

When are Cuterebra bots a problem

When they emerge to pupate

Normal host of Cuterebra

Rodents

Cuterebra breeding sites

Near animal/rodent dens

Where do we usually find Cuterebra on the animal

Tissues near head and neck

When are Cuterebra larvae pretty problematic

Aberrant migration to tissues like the eye and brain

Treatment for Cuterebra

Mechanical removal, treat it like an open wound