Microbiological quality of undulated surf clam (Paphia undulata) in selected areas in Samar, Philippines

MICROBIOLOGICAL QUALITY OF CLAM

Abstract

Bivalves are filter feeders that ingest particles from the surrounding water, including pathogens,
which could cause illness in consumers. In Samar, Philippines no data on the microbial quality of undulated
surf clam (Paphia undulata) have previously been reported. Thus, this study was conducted to determine the
microbial quality of the species in selected areas in Samar, Philippines (Pinabacdao, Zumarraga and
Villareal). The total plate count (TPC) and total Vibrio count were beyond the standard limits set by the Food
and Drug Administration (FDA), although Salmonella was not detected in any samples. The TPC of
undulated surf clam was 5.9-6.3 log CFU·g-1 in Pinabacdao, 4.9-6.0 log CFU·g-1 in Zumarraga, and 6.3-7.2
log CFU·g-1 in Villareal. The total Vibrio count was 5.1-5.7 log CFU·g-1 in Pinabacdao, 3.9-4.6 log CFU·g-1
in Zumarraga, and 6.1 log CFU·g-1 in Villareal. Bivalves in these areas should undergo purification process,
such as relaying or depuration