Microbiology Answers

I was wondering if there's a way I can kill every germ (including "super-bugs") on my hand? And if so, how I can do it? And if not, why not? One microbiologist said I can kill every germ on my hand, by lathering my hands in soap, rinsing them with warm water, re-lathering them in soap, rinsing them with warm water again, wiping them dry, and then rubbing them vigorously with hand sanitizer. I was wondering, is that really true?

Of the following human roundworms where the adults live in the intestines, which one is
directly infectious with no delay

a Enterobius vermicularis (the pinworm)
b Ascaris lumbricoides
c Necator americanus
d Trichuris trichicura

The Gram stain reaction of a bacterial cell is determined by

a whether or not it is a pathogen
b its physiology and metabolism
c the media on which it is grown
d how long the counterstain is applied

Is it possible to plate a contaminated BHI solution on a blood agar ?

The federal “BioWatch” program is an early detection program for

a Monitoring drinking water quality in major cities
b Monitoring the air in selected cities for possible agents of BT
c Part of the USDA’s function in tracing food-borne outbreaks of salmonella
d Surveillance for viral infections spread by birds

In the USA, what is the official standard, for general purposes, for indoor air quality (IAQ)
regarding the acceptable density of bacterial and fungal organisms in the air

a Zero cfu/m3
b <500 cfu/m3
c >750 but <999 cfu/m3
d There are no official standards for microorganisms and IAQ

Surface sampling using RODAC plates works best under what conditions

a Flat surface with an expected high bacterial count
b Concave surface with an expected low bacterial count
c Flat surface with an expected low bacterial count
d Convex surface with an expected moderate bacterial count

Although for different reasons and purposes, which of the following organizations has/have
a grouping of microorganisms as “Category A”

a CDC
b IATA
c USDOT
d All of the above

Which of the following is sometimes known as an “acute phase” marker for infection

a IgM
b IgG
c Total immunoglobulins
d IgE

Name two mechanisms by which bacteria may be resistant to the effect(s) of antibiotics.