Exam 27: Microbial Interactions With Humans

In the absence of the full complement of normal flora, due to orally taken antibiotics, opportunistic microorganisms such as _________can become established.

The upper respiratory tract usually has a considerable amount of resident microflora in a healthy adult.

Extensive growth of the streptococci in a thick bacterial layer on acidic glycoproteins on the teeth is called_________ .

Diets high in sucrose promote dental caries.

Which of the following affect(s) pathogen growth?

Attenuation occurs in a laboratory, because

Why does the influenza virus that occurs in nature as an avian pathogen infect humans?

All microorganisms that live in the human body are harmful.

Diseases of warm- blooded animals are rarely transferred to cold- blooded animals.

Which of the following is NOT important for the adherence of bacteria to other bacteria as well as to host tissue?

The environment in which an individual is born determines the kinds of microorganisms that would colonize his or her body.

To speed the establishment of competitive flora, recolonization of the gut by desired species can be accomplished by the administration of _________.

Vaginal acidity in the adult female is due to acid production by Lactobacillus acidophilus.

A polymer coat consisting of a dense, well- defined polymer layer surrounding a cell is called a

Gingivitis is cause by all of the following organisms EXCEPT

Bacteria make up about one- third the weight of fecal matter.

Which of these microorganisms is most likely to be found in the gut?

Decalcification of the tooth enamel due to the production of high concentrations of organic acids in the mouth is known as

Describe how orally taken antibiotics can result in the harmful alteration in digestive functions and disease.

The acidic pH (about pH 2) of the mouth makes it a virtually sterile environment.