Population Demographics for Lebanon County, Pennsylvania in 2016 and 2017. Other Counties and Cities in Pennsylvania.
Hookworms can produce any of the following symptoms â though symptoms may only appear with heavy infections: 1  Failure to gain weight or weight loss. 2  Loss of appetite. 3  Diarrhea. Anemia (pale gums, weakness) sometimes seen and can be a cause of death in puppies.  Bloody or tarry stools may be present.
However, each child may experience symptoms differently. Symptoms may include: Respiratory infections (symptoms may develop 2 to 14 days after exposure). Intestinal tract infections (symptoms may develop 3 to 10 days after exposure); symptoms usually occur in children younger than 5 years and may last 1 to 2 weeks. Symptoms of a common cold--runny nose.