Public Health Laboratories.
D001419:Bacteria / Q000302:isolation & purification; D049672:History, 19th Century; D049673:History, 20th Century; D007753:Laboratories / Q000266:history*; D008404:Massachusetts; D009518:New York; D011634:Public Health / Q000266:history*; D014481:United States; D014881:Water Supply / Q000266:history