clostridium, salmonella typhimurium, coli, salmonella, vibrio, listeria monocytogenes, siphonage, salmonella typhi, enteric bacteria, clostridium perfringens, pseudomonas, dysentry, listeria, west nile virus, potato wart, shigella, aspergillus, contamination, coliform, salmonella enteritidis, trichinosis, bacteria, ciguatera, clostridium botulinum, giardia, cryptosporidiosis, enterococcus, amebic dysentery, toxin, amoebiasis, paratyphoid, legionella, coccidia, cocci, whipworm, enteritidis, faecal matter, stomach flu, arboviruses, acidophilus, lungworm, babesia, itch mite, botulism, giardiasis, pasteurella, pinworms, chlorination, bacillary dysentery, heptachlor, serratia marcescens, coliform bacteria, leptospira, neisseria, enterotoxin, trichinella, bilharzia, serratia, yersinia, coagulase, cysticercosis, toxicosis, prussic acid, sicknesses, ascaris, ebola virus, marburg, late blight, contaminants, metritis, enteric fever, h. pylori, hog cholera, tapeworm infection, endrin, coccidiosis, potability, l. monocytogenes, toxoplasma, diarrhoea, oocyst, enterobacteria, fecal matter, enteritis, nitrofuran, hookworms, chlordane, saxitoxin, amonia, innoculation, aspergillosis, klebsiella, rocky mountain spotted fever, blastomycosis, outbreaks, escherichia coli, typhoid, yersinia pestis, disinfestation, spinach, greenfly, undulant fever