Hookworm infections are diagnosed by inspecting a stool sample of the infected person under a microscope in a laboratory and looking for the hookworm eggs. In case there is an infection, the number of eggs will be counted so as to see how severe it is.
Apart from this, anemia should also be checked through complete blood count and there must be a requirement of differential count to look for eosinophilia. These tests would be done to evaluate the level of hookworm infection. A high blood count will indicate the presence of infection.
Even Specific diagnosis with PCR can be employed for confirming hookworm infection.
Endoscopy is rarely done that would reveal the presence of adult hookworms in the intestine. This is done to identify the species of the work that has infected the person. In order to check lung involvement in hookworm infection, Chest X-rays is to be done.