Parasitosis refers to the presence of parasites in the human body, which can have a range of effects on an individual's health, including impacts on the immune system, gut health, and overall well-being. Research is being conducted to better understand how parasitic infections might contribute to the development or exacerbation of ASD symptoms.

Parasitic infections can trigger a variety of immune responses, leading to inflammation and disruptions in the gut microbiome. These changes may result in an imbalance between beneficial and harmful bacteria, which could influence the functioning of the immune system and other physiological processes. Some studies have suggested that individuals with ASD might have a higher prevalence of parasitic infections, and that treating these infections could lead to improvements in ASD symptoms. However, more research is needed to establish a causal relationship between parasitosis and ASD, and to identify the underlying mechanisms through which parasites might affect neurological development and function.