BIOD 171 MODULE 5 EXAM QUESTIONS AND
ANSWERS LATEST 2025-2026 UPDATE
Define commensal bacteria. - Answer-Commensal bacteria is a
bacterium that does not harm its host or gain anything from its host; it
only gets nutrients from it.
How can Staphylococcus be differentially tested? - Answer-Species of
Staph can be differentially tested by using bile salts which will make
them grow.
Match the following symptoms with their respective diseases:
1. Folliculitis
2. Scalded-skin syndrome
3. Impetigo
4. Conjunctivitis
5. Opthalmia Neonatorum
A. Childhood skin disease near mouth/nose
B. Infection of thin, transparent scleral tissue
C. Infection occurs at time of birth
D. Pus-filled lesions on skin or hair
E. Ruptured pustules; treated with Penicillin - Answer-Folliculitis - D.
Pus-filled lesions on skin or hair
, Scalded-skin syndrome - E. Ruptured pustules; treated with Penicillin
Impetigo - A. Childhood skin disease near mouth/nose
Conjunctivitis - B. Infection of thin, transparent scleral tissue
Opthalmia Neonatorum - C. Infection occurs at time of birth
True or False: The causative agent of conjunctivitis can be either
bacterial or viral. - Answer-True.
True or False: Tuberculosis is best identified by a Gram stain. -
Answer-False.
True or False: You can become infected with TB simply by sharing a
drink with someone who is currently infected with TB. - Answer-False.
Define the concept of universal precautions. - Answer-Universal
precautions include all known or unknown samples that could possibly
be hazardous (or pathogenic) and should be treated as such.
List at least 3 observations a researcher would be sure to note while
assessing an unknown microbial sample. - Answer-1. Size and shape
2. Color changes to organism or media around it
3. Gram status (+ or -)
ANSWERS LATEST 2025-2026 UPDATE
Define commensal bacteria. - Answer-Commensal bacteria is a
bacterium that does not harm its host or gain anything from its host; it
only gets nutrients from it.
How can Staphylococcus be differentially tested? - Answer-Species of
Staph can be differentially tested by using bile salts which will make
them grow.
Match the following symptoms with their respective diseases:
1. Folliculitis
2. Scalded-skin syndrome
3. Impetigo
4. Conjunctivitis
5. Opthalmia Neonatorum
A. Childhood skin disease near mouth/nose
B. Infection of thin, transparent scleral tissue
C. Infection occurs at time of birth
D. Pus-filled lesions on skin or hair
E. Ruptured pustules; treated with Penicillin - Answer-Folliculitis - D.
Pus-filled lesions on skin or hair
, Scalded-skin syndrome - E. Ruptured pustules; treated with Penicillin
Impetigo - A. Childhood skin disease near mouth/nose
Conjunctivitis - B. Infection of thin, transparent scleral tissue
Opthalmia Neonatorum - C. Infection occurs at time of birth
True or False: The causative agent of conjunctivitis can be either
bacterial or viral. - Answer-True.
True or False: Tuberculosis is best identified by a Gram stain. -
Answer-False.
True or False: You can become infected with TB simply by sharing a
drink with someone who is currently infected with TB. - Answer-False.
Define the concept of universal precautions. - Answer-Universal
precautions include all known or unknown samples that could possibly
be hazardous (or pathogenic) and should be treated as such.
List at least 3 observations a researcher would be sure to note while
assessing an unknown microbial sample. - Answer-1. Size and shape
2. Color changes to organism or media around it
3. Gram status (+ or -)
