Non-Acid Fast, Gram Positive Actinomycetes

Question 1

Its species are Gram-positive and rod-shaped with branching filaments
They are found in the soil

Answer 1

Streptomyces

Question 2

Human pathogen of Streptomyces

Answer 2

Streptomyces somaliensis

Question 3

Culture media for isolation of streptomyces

Answer 3

BHI agar and SDA

Question 4

Culture: Colonies are dry to chalky and heaped; some colonies exhibit a grayish white color and
a ―”musty basement odor”

Answer 4

Streptomyces

Question 5

a fungal wound infection caused by actinomadura

Answer 5

eumycetoma

Question 6

The microscopic and colony morphology of the species of this genus is very similar to that of the
Nocardia species

Answer 6

Actinomadura

Question 7

It causes fungal wound infection that is known as eumycetoma

Answer 7

Actinomadura

Question 8

The most common form of eumyctetoma is known as ; in which the infection is
localized on the patient‘s foot

Answer 8

mycetoma pedis

Question 9

Culture: Routine agar-Colonies exhibit a ―”molar tooth” appearance

Answer 9

Actinomadura

Question 10

It is a gram-positive actinomycete and a facultative, intracellular pathogen
 It is the etiologic agent of Whipple‘s disease that affects the gastrointestinal tract joints, and
muscles and is characterized by abdominal pain and diarrhe

Answer 10

Tropheryma whipplei

Question 11

It is isolated from human feces, saliva, and gastric secretions

Answer 11

Tropheryma whipplei

Question 12

Diagnostic test for Tropheryma whipplei

Answer 12

(+) periodic acid Schiff staining (PAS) macrophages