Which disease is associated with the presence of pathogenic organisms in water?

Giardiasis is an intestinal infection caused by the Giardia lamblia parasite, which is indeed associated with the presence of pathogenic organisms in water. This disease can be contracted by drinking water that is contaminated with fecal matter containing the cysts of the Giardia parasite. Waterborne transmission of giardiasis highlights the importance of proper wastewater treatment and good sanitation practices to prevent the spread of such diseases. The presence of Giardia in water sources indicates ineffective treatment processes or contamination, underscoring the critical role of vigilance in public health and environmental safety.

Other diseases listed, such as diabetes, asthma, and hypertension, are not caused by pathogens present in water. These conditions stem primarily from genetic, environmental, or lifestyle factors rather than microbial contamination in drinking water, making giardiasis the clear association with waterborne pathogenic organisms.