contamination by

Examples (10)

• Always keep food covered to prevent contamination by flies.
• The river suffered serious contamination by industrial waste.
• Researchers are studying the effects of soil contamination by pesticides.
• Air quality was poor due to contamination by smoke from the wildfires.
• Strict protocols are in place to avoid sample contamination by airborne bacteria.
• The lab results were invalid because of contamination by an unknown substance.
• Officials issued a warning about water contamination by lead from old pipes.
• The entire batch of medicine was discarded after discovering contamination by heavy metals.
• Any future space mission must prevent planetary contamination by terrestrial microbes.
• The risk of contamination by E. coli is a major concern in the food industry.