A patient presents with severe colitis associated with an overgrowth of Clostridium difficile in the lower bowel. The most likely cause of this condition is

A. botulinum food poisoning
B. a stomach ulcer
C. a compromised immune system
D. antibiotic therapy
E. mechanical blockage of the large intestine


Ans: D. antibiotic therapy

Biology & Microbiology

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Environmental genomics is sometimes called metagenomics.

Answer the following statement true (T) or false (F)

Biology & Microbiology

The difference between latex agglutination and hemagglutination is:

a. the type of particle used to carry the anti-body. b. the type of target organism involved. c. that hemagglutination is less specific but more sensitive. d. that hemagglutination procedures are temperature sensitive.

Biology & Microbiology

Centriole replication occurs during ____

a. G1 phase b. S phase c. G2 phase d. prophase e. telophase

Biology & Microbiology

What changes should result from using stem cells in therapeutic cloning?

A) healthy tissues B) new genomes C) model organisms D) reproductive clones

Biology & Microbiology