Risk factors

Risk factors for ascariasis include:

• Age. Most people who have ascariasis are 10 years old or younger. Children in this age group may be at higher risk because they're more likely to play in dirt.
• Warm climate. In the United States, ascariasis is more common in the Southeast. But it's more frequent in developing countries with warm temperatures year-round.
• Poor sanitation. Ascariasis is widespread in developing countries where human feces are allowed to mix with local soil.