PART X — ENVIRONMENTAL CONTAMINANTS 



FOOD AND WATER CONTAMINANTS 



Agents, pollutants 



Definite Effects 



Possible Effects 



Bacteria 



Viruses 



Protozoa and metazoa 



Metals 



Nitrates 



and/or phosphates 

 and/or organic matter 



"Softness" factor 



Sulfates and/or phosphates 



Dissolved solids 



Fluorides 



Chlorinated hydrocarbon 

 pesticides 



Oil-petroleum 



Thermal (heat) pollution 



Phenols 



1. Epidemic and endemic gastro-intestinal 

 infections (typhoid, cholera, shigellosis, 

 salmonellosis, leptospirosis, etc.) 



2. (Malodor) 



4. Epidemic hepatitis, and other viral 

 infections 



6. Amoebiasis, schistosomiasis, hydatidosis 

 and other parasitic infections 



7. (Malodor) 



8. Lead poisoning 



9. Mercury poisoning (through food chains) 



10. Cadmium poisoning (through food chains) 



11. Arsenic poisoning 



12. Chromium poisoning 



15. Methemoglobinemia (with bacterial 

 interactions) 



18. (Eutrophication) 



19. (Malodor) 



21. Gastro-intestinal hypermotility 



22. Impaired potability 



23. (Impaired value for irrigation and 

 industry) 



24. Fluorosis of teeth when in excess 



25. (Ecological damage) 



26. Impaired potability 



27. (Ecological damage) 



28. Impaired potability 



3. Secondary interaction with 

 malnutrition and with nitrates 

 in water (cf., No. 15) 



5. Eye and skin inflammation from 

 swimming 



13. Epidemic nephropathy 



14. "Blackfoot" disease 



15. Methemoglobinemia (bacterial 

 interaction not required) 



17. Nitorsamine effects on mutagenesis 

 and/or carcinogenesis 



20. Increase in cardiovascular disease 



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