Abstract
A total of 517 samples Salmonella strains isolated from stool and blood patients, hospitalized in Trang,
Phathalung and Songkhla provinces in 2011-2014. The ratio of female to male was 1 : 0.98. The predominant
age group of isolates were < 1 year (137 cases 26.5 %). Serotypes of Salmonella isolated from stool were
438 samples and blood were 79 samples by Kauffmann-White scheme and Sven Gard method. Salmonella
serotype Weltevreden was the most predominant 120 samples (27.4%) followed by serotype Typhimurium
97 samples (22.1%) isolated from stool. Salmonella serotype Enteritidis was the most predominant 31 samples
(39.2%) followed by serotype Typhi 19 samples (24.1%) isolated from hemoculture Drug susceptibility of
Salmonella by the disk diffusion method with 5 antimicrobial agents such as Ampicillin, Tetracycline,
Co-trimoxazole, Chloramphenicol and Norfloxacin. Salmonella strains isolated from stool were the most
predominant resistant to Ampicillin (54.5%), followed by Tetracycline (45.2%). Salmonella strains isolated
from hemoculture were the most predominant resistant to Ampicillin (36.0%), followed by Tetracycline
and Co-trimoxazole (28.0%). All of Salmonella isolated were susceptible to Norfloxacin (100%).
The results showed serotype and drug resistance pattern of Salmonella isolated from stool and blood
for fundamental data and guidance in selecting antimicrobial agents in Trang, Phathalung and Songkhla
provinces
