MTSB
| Acronym | Definition |
|---|---|
| MTSB | Modified Trypticase Soy Broth (pathology) |
| MTSB | Michael Tschechow Studio Berlin (Germany) |
| MTSB | Massillon Tiger Swing Band (high school marching band; Massillon, OH) |
| MTSB | Masscorp Trading Sdn. Bhd. (Kuala Lumpur, Malaysia) |
| MTSB | Metropolitan Toronto School Board (Canada) |