A slow-growing, acid-fast bacillus provides the following reactions:
Niacin: no color change Pigment: no pigment when grown in dark or light
Nitrate: no color change Urease: no color change
Semi-quantitative catalase: 25 mm Arylsulfatase: no color change
Pyrazinamidase: pink Tellurite: black precipitate
Which of the following patient history/specimen types was the original source for this organism?
A) Skin lesion from a 39-year-old female who owns a tropical fish store
B) Sputum from an 18-year-old female illegal alien from Mexico
C) Stool from a 44-year-old male with HIV
D) Lymph node from a 4-month-old male after receiving the BCG vaccine
Question 2
The key to the successful use of bacteriostatic antibiotic in treating an infection is
A) the compliance of the patient. B) its mode of administration.
C) an immunocompetent state. D) its spectrum of activity.
Color-enhanced scanning electron micrograph of HIV virus (red) infecting T-helper cells (green).
A peroxidation reaction involving a fatty acid is depicted in the figure below.
A single base substitution leading to a single amino acid substitution in the hemoglobin beta chain
DID YOU KNOW? DRIVING FAST CAUSES HAIR LOSS
Language and Color Perception
Acid–Base Balance