merged

Occurrence of Histamine Producing Bacteria in Thunnus Tongol Treated
With Garcinia Atroviridis
Nor Ashikin binti Mohd Radzi
Supervisor: Assoc. Prof Dr. Muhd Danish Daniel bin Abdullah
Bachelor of Applied Science (Fisheries)
School of Fisheries and Aquaculture Sciences
Histamine poisoning is the highest food safety concern from fish consumption. Longtail
tuna were purchased from Tok Jembal area, Malaysia to determine the occurrence of
histamine producing bacteria in Thunnus tonggol by using Garcinia atroviridis leaves
extract. The leaves extract was used in this study as it is a natural remedy that does
not contain side effect of its using for seven days. The results at the initial showed
that the high concentration of extracts indicated reduction of bacteria count for both
PCA (Log CFU ⁄ g = 6.02) and Niven Agar (Log CFU ⁄ g 0.88). Then, the count turn for
both PCA to increase at Day 1 which are 6.12, 1.62 and 1.58 while for Niven Agar are
1.36, 0.57 and 0.31. The same pattern can be seen at other days. The histamine
producing bacteria was identified by using Vitek system. The outcomes of the result
were Morganella morganii with the probability of 93% and 96%.
613 | UMT UNDERGRADUATE RESEARCH DAY 2018