Psychrotrophic abcteria in milk and milk products in assiut city

1- direet enumertion of pSY5hrotroph10 baoteria ,One hundred and tourty random samples of milk and milk produots, :1nQlu~ing milk (40), Damistta oheGsG (20) Ko.reish OhsGse (20). Hard chaese (20)and table buttGl1. (20) were oo1l6otsd fl:’om As~iu.t Citymarkets streets vendors and Shopkeepers.Three d it t erent madm (heart inf usdon t St~da.rd mothods and Tryptie~s~ soya agar) with and witho”t orystalv10let wa.re used foX” di:reot anu&1laratu>n of psyohrotrophiobilotar:2A. A higar. oount oould be reoovered on heart infus10n agar.!I’ha mean va.lues of psyOhtro~rop~ oount on hen.rl infusion agar werG 13. a x 106 /mJ.. - • J2el X 106, g. .... .14 x 105 I g, 26 X ao 6/ g t )0.8 X lJJ 5, s ~ a., __ ~ lJ:J6/ g. of’Gx.’\II1~d ~kJ mreuh oheesG. Dam1e~ta; cheesa, hard~oheese, ioekre-am and bu-cter samples, r6spa~t1vGlyt ,?,hlleon hao.rt .:1nru.s1on agar with orystal violet the count , were 7.02 X 106/mlt 9.8 X lo6/g• , 0.3 X 10’ /g, 25 X 106/ g. 2.6.1 X 105 /gG and 9.9 X lo6/g• of e:xnm1ned so.mplea, raspeotivGly.On stdLncl.D.rd methods agar the mean values of.