Final answer:
The statement about clinical signs of nodular worm is false; while some helminth infections can present similarly, the specific symptoms can vary widely based on the type of worm and infection severity.
Step-by-step explanation:
The statement 'Clinical signs of the nodular worm are diarrhea, a pot-bellied appearance, and poor growth' is false. Although some helminth infections can present with gastrointestinal signs including diarrhea and poor growth, the specific clinical signs associated with nodular worm infections (Oesophagostomum spp. in animals) are not typically described in this manner. However, the general symptoms of helminthic infections can overlap and include various gastrointestinal issues, malnutrition effects, and others depending on the type of worm and severity of infection. For instance, Strongyloides stercoralis can cause strongyloidiasis, where the larvae enter the body through the skin and eventually travel to the intestines, potentially leading to abdominal symptoms and other issues such as chronic infections. Alternatively, Ascaris lumbricoides, a type of roundworm, can cause intestinal blockage, especially in severe cases of infestation. Nonetheless, the symptoms vary greatly based on the worm's life cycle, the infection route, and host factors.