Coliform Content of Shellfish (Anadara antiquata) in Davao Gulf

The study was conducted to determine the coliform content of shellfish Anadara antiquata from three selected areas of Davao Gulf. One shot sampling was employed in the study and it was conducted within the month of February, 2010. Test for coliform and fecal coliform was done using the multiple-tube fermentation technique through the presumptive, confirmed and fecal coliform test. Total Colony Count of coliform in Anadara antiquata was done through plate counting using selective media. Coliform content in Anadara antiquata from Panabo City and Tagum City were > 1,100 MPN/g of sample. While in Pantukan, the coliform content in Anadara antiquata from the estuary was 460 MPN, 240 MPN near mangrove area. These values exceeded the critical limit 230 MPN set by APHA. Fecal coliform content in Anadara antiquata was high from Panabo City, 240 MPN from areas near estuary and near coastal houses. In Pantukan, Compostela Valley Province, the fecal coliform content in Anadara antiquata was 240 MPN near mangrove area. The fecal coliform content in Anadara antiquata from these areas exceeded the critical limit. Total colony count of coliform in Anadara antiquata from Panabo and Tagum City was higher compared to Pantukan and the total colony count of coliform in Anadara antiquata did not differ in 3 selected habitats. High coliform content in A. antiquata in three areas of Davao Gulf could pose health risks to the consumers. High content of fecal coliform in shellfish indicates presence of disease causing microorganisms which are harmful to human health. It is recommended to safeguard public health through fecal coliform/bacteriological monitoring of the shellfish and their growing waters since these microorganisms are pathogens or disease causing. Conduct also Information Education Campaign (IEC), informing the Local Government Units and the public that wastes of both fecal and non-fecal in origin can be accumulated by shellfish Anadara antiquata.