Streptomyces isolation can be distinguished by incubating the culture at what temperature?

Streptomyces isolation can be distinguished by incubating the culture at what temperature?

• A. Heat shocking the culture
• B. Incubating the culture at 25°C
• C. Incubating the culture at greater than 37°C
• D. Drying the specimen before inoculating the culture media

Answer: (B)

Streptomyces are environmental, soil-dwelling actinomycetes that grow best at room temperature. Incubating cultures around 25°C supports their characteristic colony appearance—dry, powdery, and chalky with evident aerial hyphae and spores—making them easier to recognize and distinguish from many other bacteria that favor human-body temperature or different growth conditions. Higher temperatures (above 37°C) tend to suppress Streptomyces or favor organisms that thrive at warmer conditions, while the other options describe sample-prep or handling steps that don’t reveal their natural growth pattern. So, incubating at about 25°C is the most reliable condition for isolating and identifying Streptomyces.

Streptomyces are environmental, soil-dwelling actinomycetes that grow best at room temperature. Incubating cultures around 25°C supports their characteristic colony appearance—dry, powdery, and chalky with evident aerial hyphae and spores—making them easier to recognize and distinguish from many other bacteria that favor human-body temperature or different growth conditions. Higher temperatures (above 37°C) tend to suppress Streptomyces or favor organisms that thrive at warmer conditions, while the other options describe sample-prep or handling steps that don’t reveal their natural growth pattern. So, incubating at about 25°C is the most reliable condition for isolating and identifying Streptomyces.