The objective of this study was to analyze coliform bacteria in local cooked food in Lampang
hospital. The studied population was local cooked foods which were collected from 2 local food shops.
During September 14th to October 8th, 2010, 15 types of local cooked food were collected two times
from each shop in each day (in the morning between 8.30 to 9.30 am and in the afternoon between
12.00 to 13.00 pm). Then those food types were collected again after a week. Therefore there were 120
samples. Coliform bacteria was determined using MPN method (Most Probable Number). It is a
standard method of the Department of Medical science, Thailand. Data were analyzed using descriptive
statistics.
The
The results revealed that 120 samples contained coliform bacteria ranged from more than two to
more than 1600 MPN/g. However, there were 20 samples (16.67%) that contained coliform bacteria
more than 500 MPN /g which were not passed the standard quality. There were three samples (2.50%)
from Gang including Gang Khanun 1 sample and Kang Yokgloy 2 samples; four samples (3.33%) from
Tum including Tum Khanun 1 sample and Tum Tophugyaw 3 samples; seven samples (5.83%) from
Numprig including Numprig Plara 3 samples, Numprig Num 1 sample and Numprig Pranin 3 samples;
two samples (1.67%) from Yum including Yum Noomaidong 2 samples; four samples (3.33%) from
Lab including Lab Muokuow 1 sample and Lab Pla 3 samples. These samples contained coliform
bacteria 1600 MPN/g or more, except Numprig Plara which contained coliform bacteria 900 MPN/g.