The article describes the methods of diagnosis of helminth infestations: microscopic, immunoenzyme analysis, serology, polymerase chain reaction, bioresonance diagnostics, haemoscanning, as well as instrumental methods (ultrasound and X-ray examination, computed tomography) and laboratory analysis of indirect value (complete blood count, liver function tests, fecal dysbiosis). Advantages of methods, as well as disadvantages, the reliability of the findings are described. Questionnaire for patients are offered to determine the risk of helminth infestation.