Chapter 5

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Microbiology Basics

disease

failure of the body to function normally

pathogen

disease-causing organism

infection

disease caused by a pathogen or its toxin

vector

an abject (living or non living) that transfers a pathogen from one organism to another

normal flora

organism that normally and harmoniously live in or on the human body

parasite

organism that requires a living host in which to survive

nosocomial

hospital-acquired infection

gram stain

dye used to identify different kinds of bacteria

portal of exit

routes by which pathogens leave the body

portal of entry

routes by which pathogens enter the body

bacteria

coccus, cacillus, curved rod

virus

acts as a parasite to the infected cell

fungi

mycotic infections

protozoa

amebas, ciliates, flagellates, sporoza

worms

helminthes

ectoparasites

anthropods that live on the surface of the body

arthropod vector

mosquito

systemic infection

wide spread body infection

localized infection

infection restricted to a small area

gram positive

stains purple or blue

carrier

Which word best characterizes Typhoid Mary?

parasite

Which of the following requires another living host for its continued existence?

bacteria

Cocci, bacilli and curved rods are classified as

Vector

A fomite is a

are best described as ectoparasites

Biting flies, fleas, and ticks

vectors

With regard to infection disease, arthropods most often act as

Infection

Which of the following describes the signs and symptoms that develop in response to a pathogen?

A pox infection

is a skin lesion

bacteria

Which of the following are classified as Gram(+) and Gram (-)

Shingles

Herpes varicella-zoster may lay dormant in the nerves for many years; when awakened in later life it causes

Itching and discomfort

Ectoparasites are most likely to cause

Mycobacterium tuberculosis

Which of the following is called "acid-fast" bacillus?

Malaria

The disease is caused by a sprozoan carried by a mosquito

pathogen

Which of the following is defined as a disease-producting micro organism?

causative organism of impetigo

Which of the following is least descriptive of Canadida Albicans?

Parasitic

Rickettsiae require a living host for their survival and are there fore considered to be

Systemic infection

Influenza is best described as a(n)

Pinworms

Which of the following lives in the intestinal tract and lays its eggs in the perianal area, causing severe pruritus?

Arthropod vector

The tick associated with Rocky Mountain spotted fever is referred to as a

bacteria

Rickettsiae and chlamydia are classified as

Rickettsiae are

often carried by fleas, ticks, and body lice

Becomes more resistant to harsh environmental conditions

What is the significance of bacterial spore formation? The bacterium

worm

A helminth is a

protozoa

This group includes single-cell animal-like microbes such as amebas

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