Influence of breed and season on lactoperoxidase system components in cow's milk in Western Cameroon

摘要

AstudywascarriedoutinthewesternpartofCameroontoassessthelevelsoflactoperoxidaseactivityandthiocyanateinthemilkofdifferentcowbreeds.27herdswereidentifiedand54milkingcowsselected.Enzymeactivitywassignificantlyhigher(P0.05)intheGoudalibreed(1859#181;Mproduct/min)thanintheotherbreeds.ThegreatestvariationwasobservedamongRedFulanicows(1268to2241#181;Mproduct/min.).Thiocyanateconcentrationwashighest(P0.05)intheGoudalibreed(13.60ppm)andalsothemostvaried(8.88to19.8ppm).Enzymeactivityandthiocyanatecontentweresignificantlyhigherinthedrythanintherainyseason,irrespectiveofthesamplingsiteandtheyearofsampling.Suchsignificantvariationsindicatethattheefficiencyofthelactoperoxidasesysteminpreservingmilkwillalsovary.Thereforeapreliminaryinvestigationisrecommendedforeachareaofinterestsothattheconcentrationsofthiocyanatenaturallypresentinthelocalmilkareknown.Thiswillserveasabasisindeterminingthequantitythatneedstobefurtheraddedtowardsoptimisingthesystem.