Microbiology, led by Direk Limmathurotsakul (acting Head), conducts research into clinical and laboratory aspects of bacterial and viral illnesses in Thailand, Cambodia and Sri Lanka, and supports the embedded microbiologists in SMRU and the Laos Collaboration. The department’s research interests are wide ranging, and include studies of clinical and molecular epidemiology, diagnostics, antimicrobial drug resistance, the pathophysiology of bacterial infections, host susceptibility, and the treatment of melioidosis, leptospirosis, rickettsial infections and severe sepsis. The department has microbiology laboratories in Bangkok (including a new Biosafety Level 3 facility), Ubon Ratchathani, Udon Thani and in Siem Reap (Cambodia), and is involved in the running of the laboratories in SMRU and Laos. The department has "Consultant Laboratory" status in the WHO/PDVI dengue laboratory diagnosis network. The group coordinates two multicentre clinical trials in melioidosis, liaising with four other collaborative clinical research sites in Northeast Thailand.