Which population is commonly affected by roundworm infections?

Roundworm infections, particularly those caused by species like Ascaris lumbricoides, are prevalent in certain populations, with infants and small children being the most commonly affected. This demographic is particularly vulnerable due to several factors. Young children often have close contact with soil, where the eggs of roundworms can be found, and they may engage in hand-to-mouth behaviors that increase their risk of ingestion.

The immune systems of infants and small children are still developing, making them less able to fend off infections. Nutritional deficiencies, which can be more common in young children, may also play a role in their susceptibility to such infections. Overall, the combination of behavioral factors, environmental exposure, and biological susceptibility leads to a higher incidence of roundworm infections in this specific age group.

In contrast, other age groups like young adults, middle-aged men, and senior citizens generally have lower rates of infection mostly due to differences in exposure and immune response, as well as changes in lifestyle and hygiene practices.