Intro to Parasitology 5.1

The study of parasites and parasitism.

An organism that lives on or within and at the expense of another organism (host).

The state or condition of being infected or infested with parasites.

Invasion by and multiplication of microorganisms in body tissue resulting in disease.

Harboring of macroscopic parasites.

A parasite that lives on the outer surface of the body.

A parasite that lives within the body of the host.

This parasites are most often associated with infestation

These parasites are most often associated with infection.

This is a parasite that derives benefit from the host without causing any harm.

A stage of an organism's development which is resting, protective, non-motile, not capable of reproduction.

State of an organism's development which is motile, vegetative, and capable of reproduction.

period from initgial exposure to point which parasites or their products can be demonstrated in the feces other excretions, blood, by biopsy or other diagnostic tests.

an organism that harbors a parasite; the organism from which the parasite obtains its nourishment.

a required host in a parasitic life cycle in which essential larval development must occur before the parasite is infective to its definitive host. development occurs but adulthood is not reached.

any host harboring the adult or sexually mature stage of the parasite

animal that harbors a species of parasite that can be transmitted to and infect man.

the sequence of morphologic and environmental stages necessary for the survival and reproduction of parasites.

an arthropod or other agent that carries microorganisms from one infected individual to another.

what three factors affect the endemicity of parasites?

what are four factors that affect the distribution of human parasites?

What is the geographical distribution of human parasites?

what are three factors involved in the transmisssion of parasites?

what are the three types of parasite life cycles?

No intermediate host are transmitted from person to person by what two means?

one intermediate host usually use a large _______, _________ or _________.

two intermediate host are usually from fresh water or vegetation to ___________ to _________ to man.

this is the smallest parasite with a size of 4-6u by 2-3u.

this is the longest parasite with a size of 30 feet or longer.

This parasite has the largest ova with a size of 82u by 135u.

what is the most common portal of entry for parasites?

this portal of entry is seen with pinworm ova.

This portal of entry intermediate fors penetrate the skin (e.g. hookworm larva).

T. vaginalis uses what protal of entry?

This parasite can be transmitted transplacentally.