ch 10

Nematodes

A group of helminths which include ascaris lumbricoides and the cause of intestinal obstruction due to large numbers that reproduce in the GI tract are generally called

Trophozoite

A protozoan in a metabolically active feeding and growth stage of the life cycle.

Trichomoniasis

A sexually transmitted parasitic protozoal disease of the urogenital tract.

flagellate

A thin, semi rigid film called a pellicle surrounds a ___ to give it a more defined shape than an amoeba.

Maculopapular

A type of skin rash characterized by reddened or pink flat spots and raised bumps.

true

An ascaris nematode can grow to 12 inches the human intestinal tract and have teeth that can chew threw intestinal mucosa to invade the abdominal cavity.

Sporozoites

Cells released from an oocyst in the disease malaria and transmitted through mosquito bites

False

Dengue fever is endemic in southern Canadian and northern US states and transmitted by deer ticks.

False

East African trypanosomiasis is also called river blindness and caused by microfilarial worms.

symbiont

In a symbiotic relationship, a parasite termed a ___ takes up residence inside a host and extracts what it needs, sometimes resulting in harm or death of host organism.

invertebrates

Living organisms which have no skeleton or backbone

False

Malaria is prevalent in developing countries and transmitted by the fecal-oral route where there is poor sanitation and contaminated drinking water.

Copepods

Microscopic water fleas infected with the guinea worm larvae that are ingested by humans who drink contaminated water.

False

Mosquitoes are vectors for the disease called bubonic plague which killed millions in the middle ages.

Hermaphrodite

Organisms such as trematodes and cestodes which possesses both male and female reproductive organs and the ability to self fertilize or cross fertilize.

True

Parasitic protozoa are capable of developing a protective cyst when environmental conditions are unfavorable.

True

Pregnant women are advised to avoid exposure to cat litterboxes due to potential for transmission parasites that cause toxoplasmosis which can harm the developing fetus.

protozoa

Single celled eukaryotic microbes called ____ are often responsible for parasitic infections in living hosts, including humans and animals.

Rickettsia

The genus___ is divided into groups; typhus, scrub typhus and spotted fever.

True

The mechanism of respiration used by most parasitic protozoa consists of facultative anaerobic processes

False

The only route of transmission of parasites which infect humans is through bites of arthropod vectors

True

The term infection pertains to the presence of endoparasites and infestation pertains to the presence of ectoparasites.

Filiariasis

Which disease causes lymphatic obstruction and the condition called elephantiasis?

Conjugation

Which of the following forms of reproduction is classified as sexual?

Arthropod

Which of the following types of organisms has a segmented exoskeleton and jointed appendages?

Malaria

Which parasitic disease is the most common in humans on a worldwide scale?

Dracunculiasis

Which tropical infection is also known as Guinea worm disease?

Gametocyte

a cell produced during conjugation and capable of dividing to form male and female sex cells.

Flukes

flat worms

Dysentery

infection of the gastrointestinal tract characterized by severe inflammation of the intestinal mucosa caused by viruses, bacteria, or parasites.