Order Acari Flashcards
Small, oval or globular mites, and legs are arranged in pairs (1-2, 3-4).
-Stigmata is absent
Suborder Sarcoptiformes
Astigmatid mites
Large mites that appear like ticks
-stigmata is located in the middle of the body
Suborder Mesostigmata
Gamisid Mites
stigmata located anterior the 1st pair of legs
Suborder Trombidiformes
Prostigmatid mites
Found in crevices near nests or bird coops (adult and nymph only active at night)
-absent host: can survive >2 years
-flaccid paralysis and anemia in young chickens
Family Argasidae
Argas persicus
“fowl tick”
disease: Borrelia anserine (avian sporochetosis)
Spinose ear tick
Otobius megnini
Host: wild cervids, mammal, man
Disease: Francisella tularensis (Tularemia)
Hut Tampan
Ornithodorus maubata
Host: deer, mammal
disease: Epizoonotic bovine abortion
Borrelia spp.
Disease of Dermacentor variabilis
Host dog
Tick paralysis
Rocky mountain spotted fever (rickettsia rickettsia)
Dermacentor andersoni
Host: Dog Cattle
Bovine Anaplasmosis (Anaplasma marginale)
Rocky mountain spotted fever
Colorado tick fever virus Tularemia
Rhipicephalus sanguineus
Host: Dog
“brown dog tick”
diseases:
Canine babesiosis (Babesia canis, G. gibsoni)
Canine ehrlichiosis (Ehrlichia canis)
Canine hepatozoonosis (Hepatozoon canis)
“blue ticks”
Genus Boophilus
One-host ticks
Boophilus annulatus
Boophilus microplus
lone star tick
Amblyomma americanum
Host: dog, cat, mammals, man
Disease: Lyme disease (Borellia burgdorferi)
Rocky mountain spotted fever
Tularemia
Bites can cause “glotch ear” / deformity of the ear in cattle
Amblyomma maculatum
“gulf coast tick”
disease: Hepatozoon americanum
Host: cattle, horses, sheep, carnivores
Tick found in snakes and monitor lizards
Amblyomma gervaisi
Tick vector of Heartwater in cattle
Tick: Amblyomma habraeum
“south african bont tick”
disease: Ehrlichia ruminatum
Nymphal stages of mites
Protonymph
Deutonymph
Tritonymph
Mites that hide during the day in nests and resting spots and only attacks host at NIGHT.
Bite Lesions: legs and breast
Nymphal: Protonymph > Deutonymph
Dermanyssus gallinae
host: fowl
“red chicken mite”
Mite: disease
Fowl pox, Newcastle disease & pasteurella
eggs are laid at the base of feathers around the vent
-found during the day.
Genus Ornithonyssus
Ornithonyssus Bursa
Host: fowls
“tropical fowl mite”
Reptile Mite & it’s disease
Ophionyssus natricis
Host: snakes, lizards, turtles, crocodiles
Disease: ophidian paramyxovirus
Causes sarcoptic Mange;
Clinical signs/ lesions
Sarcoptes scabiei
“itch mite”
Intense pruritus with YELLOWISH exudate, crusting, hyper keratinization, alopecia
Causes Notoedtric mange (located mainly in the face, ears and neck)
Notoedres cati
(feline scabies mite)
Host: cat, dog, rabbit
causes scaly leg: irritation, crusting, deformity and thickening of legs (will lift the scales off the skin)
Knemidocoptes mutans
(scaly leg mite)
Host: Chicken, Turkey, pheasants, other fowls
Intense pruritus and feather loss (vent)
Depluming itch
Knemidocoptes gallinae
Scaly face mite: host - fowls
Knemidocoptes pilae
legs are long and end in long, trumpet-shaped pedicles;
Does not burrow in the epidermis but remains in the base of the hairs and pierces skin with its chelicerae
Genus Psoroptes
