Which of the following is a symptom of roundworm infection?

Roundworm infections, particularly in humans, can lead to a range of complications, one of which is intestinal obstruction. This occurs because the roundworms can grow quite large within the intestines and may form masses. These masses can physically block the passage of food and other materials through the intestines, leading to symptoms associated with obstruction such as severe abdominal pain, vomiting, and inability to pass stool.

Symptoms like fever, rash, or necrotic ulcers are not directly associated with roundworm infections. While some parasitic infections can cause fevers or skin rashes, these are typically more relevant for other types of infections or conditions. Necrotic ulcers are not a symptom of roundworm infection and are more closely linked to other diseases or conditions that involve tissue death and skin lesions. Understanding the specifics of symptoms related to parasitic infections like roundworms helps in accurate diagnosis and treatment.