Parasitology Exam 1 Quizlet

prepatent period (definition)

The period of time between the time of exposure to an infectious agent and the time when the agent can be found in the blood or stool

where does the plague still exist

primarily out west and is found in people, dogs, and cats

demodicidae symptoms

alopecia but no pruritus (itching)

the class Insecta has how legs

6 legs

what are orders in the class Insecta

flies, fleas, bed bugs, and lice

where are mosquito eggs laid

eggs laid on water

Characteristic of third and later stages of horseflies (eating)

carnivorous or sacrophagic (to eat dead things)

Because Faceflies do not pursue their victims indoor, what is a treatment option

stable livestock during the hours of peak fly activity

Hatching of the first stage of houseflies

the first stage (maggots) will hatch in a day or less

How long does it take for the adult fly to emege

2-3 weeks

tsetse fly are located in what continent

Africa

Control of Keds

dips or sprays after sheering

Oestrus ovis affects what species

sheep nasal bot fly

Can cutebra migrate to the brain

yes they migrate through the brain

what affects the duration of the flea pupae stage

they wait for the right stimuli to change therefore they can stay at this stage for a long period of times (roughly 10 days to a year)

what factors affect the development of the flea life cycle

temperature and humidity

how do ticks attach themselves

by secreting cement where the mouthparts are attached

interstadially

transmitted through different life stages

proper removal of tick

removing the mouthpart of the tick as the embedded mouthpart can be left in

the skin of the host acting as a foreign body

which species does Pneumonyssoides affect

nasal and paranasal sinuses of dogs

Sternostoma affects what body part

bloodsucking mite of the respiratory passage

are lice vectors of disease

yes

Will trophozoites survive in water

no they will lyse if deposited into fresh water owing to their inability to osmoregulate

which form of Giardia can survive outside the host

the cysts

Oxygen requirement of trichomonads

anaerobic protists

Resiliency of cryptosporidium oocysts

The oocysts remain viable for

months unless exposed to

extremes of temperatures

Under what environmental conditions will the oocyst sporulate

heat, humidity, and oxygen

Diagnosis of coccidia

Diagnosis is based on identification of oocysts in the host's feces, but The identification of coccidian oocysts in the feces of a host does not justify a diagnosis of the disease coccidiosis unless the history and the clinical signs are in the accord as large numbers of oocysts may be counted in the feces of perfectly healthy hosts

can coccidia appear asymptomatic

yes

what is commensalism?

a relationship between individuals of two species in which one species obtains food or other benefits from the other without either harming or benefiting the latter