Viral infections: Viruses such as norovirus, rotavirus, and adenovirus are the most common causes of diarrhoea. These viruses spread through contaminated food, water or close contact with infected individuals.
Bacterial infections: Bacteria like Escherichia coli (coli), Salmonella, and Campylobacter can lead to infectious diarrhoea. Contaminated food, improperly prepared meals or poor hygiene practices can also contribute to bacterial infections and
traveller’s diarrhoea.
Parasitic infections: Parasites like Giardia lamblia and Cryptosporidium are also known to cause diarrhoea, especially in regions with inadequate sanitation and contaminated water sources.