Microbiology Exam 2 (Modules 4–6) – Verified Questions & Answers 2026

1|Page


Microbiology Exam 2 (module 4,5,6) (NEW UPDATED VERSION) LATEST
ACTUAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED QUESTIONS AND
ANSWERS) | GUARANTEED PASS A+ UPDATED THIS YEAR



Cryptosporidiosis is caused by _______ - CORRECT ANSWER the protozoan
Cryptosporidium, spread via the fecal oral route (contaminated water)



QUESTION :Which mode of transmission best describes the spread of Cryptosporidium from
reservoir to host? - CORRECT ANSWER Vehicle transmission via water.



QUESTION :Which of the following examples would best fall under the science of epidemiology?



Determining what factors lead to the fastest Cryptosporidium growth rate.

Determining the best treatment for an individual infected with Cryptosporidium.

Determining what factors lead to oocyte formation by intestinal Cryptosporidium

.Determining what water source in the county is contaminated with Cryptosporidium oocytes -
CORRECT ANSWER Determining what water source in the county is contaminated with
Cryptosporidium oocytes



QUESTION :If your county reported 89 cases of cryptosporidiosis last year and there were
769,000 people living in your county, what was the annual incidence rate of cryptosporidiosis in
your county? - CORRECT ANSWER 11.6



Incidence=number of cases/ total population x 100,000



QUESTION :What type of nosocomial infection is likely to arise from intravenous
catheterizations? - CORRECT ANSWER Bacteremia




2026 2027 GRADED A+

,2|Page


QUESTION :How might a patient who is not being treated with an antibiotic still be exposed to an
antibiotic? - CORRECT ANSWER Antibiotics can be used in aerosols, thereby entering the
environment.



QUESTION :Why are invasive procedures likely to increase the risk of nosocomial infections? -
CORRECT ANSWER These procedures allow microbes from the skin to enter the
bloodstream of the patient.



QUESTION :How can health care workers reduce the occurrence of nosocomial infections? -
CORRECT ANSWER Practice more stringent aseptic techniques



QUESTION :Which of the following would be considered a fomite?

an infected toy

a tick

a fly

contaminated water - CORRECT ANSWER an infected toy



QUESTION :Which of the following would be considered a vector?



Water containing bacteria from fecal matter

A fly carrying disease from fecal matter to food

Water droplets that come from a sneeze from an infected individual

Saliva that is transmitted between individuals during kissing - CORRECT ANSWER A fly
carrying disease from fecal matter to food



QUESTION :When aerosols containing pathogens spread disease from a distance of less than one
meter, it is considered - CORRECT ANSWER contact transmission




2026 2027 GRADED A+

,3|Page




QUESTION :Which of the following is considered a major category of transmission of disease? -
CORRECT ANSWER Contact, vehicle, and vector transmission




QUESTION :Which is an example of vehicle disease transmission? - CORRECT ANSWER
The presence of Listeria on undercooked chicken served for dinner



QUESTION :the study of the cause of a disease. - CORRECT ANSWER etiology



QUESTION :disease directly caused by microorganisms and not by other means, for example,
genetic or degenerative diseases. - CORRECT ANSWER infectious disease




QUESTION :this theory states that microorganisms cause infectious diseases. - CORRECT
ANSWER germ theory of disease



QUESTION :experimental requirements for identifying the agent of an infectious disease. -
CORRECT ANSWER Koch's postulates



QUESTION :nutrient-rich environment for isolating and culturing microorganisms - CORRECT
ANSWER growth media



QUESTION :organism injected with a potential infectious agent - CORRECT ANSWER
healthy lab animal



QUESTION :original source of the infectious microbial agent - CORRECT ANSWER
diseased or dead animal




2026 2027 GRADED A+

, 4|Page


QUESTION :Expected prevalence of a disease is - CORRECT ANSWER the expected
occurrence of a disease based on past observations



QUESTION :If a disease occurs at a fairly stable rate, it is said to be - CORRECT ANSWER
endemic.



QUESTION :Which of the following is NOT a cytopathic effect (CPE) of viruses?

the formation of a syncytium

formation of inclusion bodies

chromosomal changes in the host cell

All of the listed choices are possible cytopathic effects of viruses. - CORRECT ANSWER All
of the listed choices are possible cytopathic effects of viruses.



QUESTION :Endotoxins are also known as - CORRECT ANSWER Lipid A




QUESTION :When would endotoxins be released from a bacterial cell? - CORRECT ANSWER
when the cell dies



QUESTION :Which of the following would be the first sign of an infection that resulted in the
release of endotoxin? - CORRECT ANSWER fever




QUESTION :Why is a release of endotoxin into the bloodstream potentially deadly? - CORRECT
ANSWER It can lower blood pressure and cause the patient to go into shock.



QUESTION :Both portal of entry and portal of exit - CORRECT ANSWER skin

parental route

mucous membrane


2026 2027 GRADED A+