FOR MI­CRO­BI­O­LOG­I­CAL AC­TIV­ITY

Consumer Voice - - Packaged Full-Cream Milk -

To­tal plate count | Methy­lene blue re­duc­tion time

Mi­cro­bi­o­log­i­cal con­tam­i­na­tion is a very se­ri­ous is­sue for milk. Micro­organ­isms are re­spon­si­ble for many food-borne dis­eases. We con­ducted tests for to­tal plate count and methy­lene blue re­duc­tion time (MBRT). Th­ese tests were car­ried out on poly-packed milk pur­chased from re­tail­ers. It may be noted that FSSAI has spec­i­fied re­quire­ment at plant level only; no re­quire­ment is spec­i­fied for re­tailer level. To­tal plate count, colony-form­ing units (cfu)/ml The to­tal plate count is a mea­sure of the bi­o­log­i­cal ac­tiv­ity in milk sam­ple. This is a count of all bac­te­ria, fungi and yeast that will grow in aer­o­bic con­di­tions. As per FSS Reg­u­la­tion, to­tal plate count should not be more than 50,000 cfu/gram at plant level. Mad­husu­dan, Re­liance and Vita met the TPC

re­quire­ment. Other brands did not meet the re­quire­ment for to­tal plate count. Gokul (7,200,000 cfu/ml) was found with high­est to­tal plate count, fol­lowed by Verka (710,000 cfu/ml) and Amul (410,000 cfu/ml). Methy­lene blue re­duc­tion time (MBRT) Methy­lene blue re­duc­tion time is an in­dica­tive test to check the bac­te­rial load in milk. As per In­dian Stan­dard, MBR time for milk is not less than five hours. Ex­cept Gokul, all other brands met the re­quire­ment

for MBRT.

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