(A) Worldwide. (B) Hong Kong. Data were retrieved from 173 and 65 human cases reported in the world and Hong Kong, respectively. Infection: caused by different types of pathogens such as parasites, bacteria, viruses, and fungus; Mental illnesses excluding dementia: described as mental retardation, schizophrenia and related diseases; Neurological disorders: including epilepsy, seizure, neuro-degenerative disorder, cerebral palsy, quadriplegia, and kyphoscoliosis; Ectoparasite infestations/bites: described as pediculosis and leech bites; Open wounds: including ulcers, wound, trauma, burns, bed sores, lesions, and orbit postevisceration; Cancer: recorded as cancer, carcinoma, tumor, leukemia, and lymphoma.