title: Haem compounds as bacterial growth promoters in whey: a possible application to bovine mastitis.
abstract: The enhancing effect of haem compounds on the growth of Escherichia coli, Staphylococcus aureus and Streptococcus agalactiae in whey cultures was studied turbidometrically. Catalase, myoglobin and haemoglobin in concentrations 10(-5) to 10(-3) M enhanced bacterial growth. One explanation of this was the availability of iron by these haem compounds for the bacteria. However, evidence from experiments on free radical generating systems by t-BHP and hydrogen peroxide indicated that haem compounds scavenge activated oxygen products and so protect bacteria from oxygen toxicity.
mesh_terms: D000818:Animals; D002374:Catalase / Q000494:pharmacology; D002417:Cattle; D003470:Culture Media; D003574:Cytochrome c Group / Q000494:pharmacology; D004926:Escherichia coli / Q000187:drug effects / Q000254:growth & development; D005260:Female; D006420:Hemeproteins / Q000494:pharmacology*; D006454:Hemoglobins / Q000494:pharmacology; D007784:Lactoperoxidase / Q000494:pharmacology; D007785:Lactose; D008414:Mastitis, Bovine / Q000382:microbiology*; D009211:Myoglobin / Q000494:pharmacology; D009391:Nephelometry and Turbidimetry; D010544:Peroxidases / Q000494:pharmacology*; D013211:Staphylococcus aureus / Q000187:drug effects / Q000254:growth & development; D013292:Streptococcus agalactiae / Q000187:drug effects / Q000254:growth & development
chemical_list: D003470:Culture Media; D003574:Cytochrome c Group; D006420:Hemeproteins; D006454:Hemoglobins; D009211:Myoglobin; D007784:Lactoperoxidase; D010544:Peroxidases; C021799:microperoxidase; D002374:Catalase; D007785:Lactose