title: N-acetyl-beta-D-glucosaminidase and antitrypsin in subclinically infected quarter-milk samples: effect of bacteria and hemolysins, lactation stage, and lactation number.
abstract: Interrelationships between N-acetyl-beta-D-glucosaminidase (indicating cellular damage) and antitrypsin (indicating increased permeability between the blood and milk compartments) were evaluated in 1,411 quarter-milk samples collected during routine herd surveys. N-Acetyl-beta-D-glucosaminidase was antitrypsin, whereas, in more severe mastitis, antitrypsin had a more constant deflection. The sensitivity of both determinants was associated with the virulence of bacteria. Production of bacterial hemolytic toxins was associated with a significant increase in both determinants. Penicillinase production by staphylococci was associated with selective increases of antitrypsin.
mesh_terms: D000118:Acetylglucosaminidase / Q000032:analysis*; D000818:Animals; D002417:Cattle; D005260:Female; D006460:Hemolysin Proteins / Q000032:analysis* / Q000096:biosynthesis; D006596:Hexosaminidases / Q000032:analysis*; D007774:Lactation; D008414:Mastitis, Bovine / Q000175:diagnosis* / Q000201:enzymology / Q000382:microbiology; D008892:Milk / Q000032:analysis* / Q000201:enzymology / Q000382:microbiology; D011247:Pregnancy; D014361:Trypsin Inhibitors / Q000032:analysis*
chemical_list: D006460:Hemolysin Proteins; D014361:Trypsin Inhibitors; D006596:Hexosaminidases; D000118:Acetylglucosaminidase