Which of the following diseases is caused by waterborne infections?

The correct answer encompasses a range of diseases, all of which are caused by pathogens transmitted through contaminated water. Giardiasis is caused by the protozoan Giardia lamblia, which can thrive in unclean water and is often spread through drinking or using such water. Amoebic dysentery, or amoebiasis, is caused by the parasite Entamoeba histolytica, which also spreads through contaminated water sources. Typhoid fever, caused by the bacterium Salmonella Typhi, is another significant waterborne illness, primarily transmitted via contaminated drinking water and food.

By collectively identifying all these diseases, the correct answer highlights the pivotal role of water quality in public health, illustrating that each condition is linked to pathogens commonly found in poorly treated water supplies. Understanding these connections is critical for implementing effective water treatment and sanitation measures to prevent waterborne diseases.