Food snacks have a risk that is potential enough to cause the occurrence of diseases or health problems, this disease is referred to as foodborne diseases caused by contamination or pollution, bacteria, viruses, worms and chemicals. This study was to determine the contamination of coliform, colifecal and salmonella typhi bacteria on snacks in 4 SDN Tampan District, Pekanbaru. Examination of Coliform and Colifecal Most Probable Number (MPN) with a variety of 5-1-1 examination of salmonella typhi by culture method, followed by selective media and confirmed by biochemical reactions. The results of the study found the highest MPN index values of Coliform bacteria and Colifecal bacteria were obtained in samples A and B as much as 7 / g while the lowest MPN index value of Coliform bacteria and Colifecal bacteria were found in 3 samples of 2 colonies / g and negative Salmonella typhi. Abstrak Makanan jajanan memiliki resiko yang cukup potensial menyebabkan terjadinya penyakit atau gangguan kesehatan, penyakit akibat ini disebut sebagai foodborne diseases disebabkan kontaminasi atau pencemaran, bakteri, virus, cacing dan zat kimia. Penelitian ini untuk mentukan cemaran bakteri coliform,colifecal dan salmonella typhi pada jajanan di 4 SDN Kecamatan Tampan Pekanbaru. Pemeriksaan ColiformdanColifecalMost Probable Number (MPN) dengan ragam 5-1-1pemeriksaan salmonella typhi dengan metode kultur, dilanjutkan dengan media selektif dan dipertegas dengan reaksi biokimia.Hasil penelitian ditemukan nilai indeks MPN tertinggi dari bakteri Coliformdan bakteri Colifecalterdapat pada sampel A dan B sebanyak 7/g sedangkan nilai indeks MPN terendah dari bakteri Coliformdan bakteri Colifecal terdapat pada 3 sampel sebanyak 2 koloni/g dan Salmonella typhi negatif. Kata Kunci:Coliform, Colifecal, salmonella typhi PENDAHULUANMakanan jajanan merupakan makanan dan minuman yang diolah oleh pengrajin makanan di tempat penjualan atau disajikan sebagai makanan siap santap untuk dijual bagi umum selain yang disajikan oleh jasa boga, rumah makan atau restoran, dan hotel (Depkes RI, 2013). Makanan jajanan memiliki resiko kontaminasi
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