文档介绍：Seasonalchanges ellcontent inmilkofPolish Holstein-ellsinmilkIncattlebreeding,ellsinmilk(ellCount-SCC)://thycow–SCCupto100000/dependsonlactationnumber:1stlactationcow–upto35000/ml2ndlactationcow–upto50000/ml3rdlactationcow–upto60000/mlCowwith(sub)clinicalmastitis–SCC500000500000050000000?ellsinmilk(2)COUNCILDIRECTIVE92/46/EEC, 16June1992: Healthrulesfortheproductionandplacingonthemarketofrawmilk,heat-treatedmilkandmilk-basedproducts„[...]CHAPTERIVStandardstobemetforcollectionofrawmilk[...]'smilk[...]”COUNCILDIRECTIVE92/46/EEC 16June1992(continued)„ellcount(perml)400000(b)(b)Geometricaverageoveraperiodofthreemonths,withatleastonesampleamonth,or,ordingtoseason,methodofcalculatingresultstobeadjusted[...]”RozporządzenieMinistraRolnictwa iGospodarkiŻywnościowej zdnia29września1999r. (Polishregulations)Wprowadzonewnormiezmianyobejmują:[...].[...]klasaEkstra,klasaIiklasaIIWymaganiaszczegółowedlaposzczególnychklasmleka:Ekstra:Komórkisomatyczne  -liczbaw1ml(SCC/mllimit)→ ellCountisveryvariable:0-1-10-100-...10000000-100000000...logarithmictransformation:SCS-ellScoreSCS=log2(SCC/100000)+ 6250 12500 25000 50000 100000 200000 400000 800000SCS -1 0 1 2 3 4 5 6...Selectedreferences .,,2006:ellcountasanindicatorofsub-.(InterbullBulletin)Correlationcoefficientsbetweenclinicalandsub-clinicalmastitis:0,3-0,6Selectedreferences ,testmonth,%ofHFgenesEffectofage:.,1982:EnvironmentalFactorsInfluencingTest-ellCountsinHolsteins(JournalofDairyScience)slowdecreasewithage;steepincreaseinVIandXIIEffectofHFgenespercentage:PhilipssonJ.,,,.(LivestockProductionScience) — HFsharemayinfluenceSCS;Selectedreferences (inPolishcattle)PtakE.,BrzozowskiP.,JagusiakW.,ZdziarskiK.,2007:ellscoreforPolishBla