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ANSWERS
Process of Science (13.15)
What Are the Patterns of Antibiotic Resistance?
Lab Notebook
Place an "nr" for "not resistant" and an "r" for "resistant" in the appropriate boxes.
Antibiotic
Ampicillin
Cephalosporin
Ciprofloxacin
Subjects
Young
woma
n
nr
Common
Use
Child
treatment
of ear and
throat
infections
treatment
for people
susceptibl
e to skin
infections
treatment
of urinary
tract
infections
r
Elderl
y
person
nr
nr
r
nr
r
nr
nr
r
r
Physician
r
Questions
1. Why might a child be likely to develop ampicillin-resistant bacteria?
Ampicillin is commonly given to children to treat ear and throat infections. The
prevalence of these infections among children led to the selection of bacteria resistant to
the ampicillin. The child may have picked up ampicillin-resistant bacteria though contact
with other children.
2. Why might an elderly person be likely to develop cephalosporin-resistant bacteria?
____________________________________________________________________________________
Campbell/Reece/Taylor/Simon: Biology: Concepts & Connections, Sixth Edition, © Pearson Education, Inc.,
publishing as Benjamin Cummings
Elderly people are apparently susceptible to skin infections and are treated with
cephalosporin. The regular use of cephalosporin selected for bacteria resistant to this
antibiotic.
3. Why might a young woman be likely to develop ciprofloxacin-resistant bacteria?
Ciprofloxicin is successful in treating urinary tract infections. It seems that women are
treated more for these infections. The regular administration of ciprofloxacin resulted in
the antibiotic-resistant bacteria populations on the young woman in the study.
4. Why might a physician be likely to develop bacteria that are resistant to all antibiotics?
Many physicians are in regular contact with people being treated for bacterial infections.
It is expected that they would pick up antibiotic-resistant bacteria from their patients. The
patients' bacteria can possibly transfer the antibiotic-resistance traits to the physician's
bacteria.
____________________________________________________________________________________
Campbell/Reece/Taylor/Simon: Biology: Concepts & Connections, Sixth Edition, © Pearson Education, Inc.,
publishing as Benjamin Cummings