Functional Organ Disorders in Children Caused by Parasitic Infections

Parasitic diseases remain a major challenge in modern medicine and public health. They are pathological conditions that arise as a result of the vital activity of helminths and protozoan microorganisms within the human body. The complex interaction between the parasite and the host determines the clinical manifestations, severity, and duration of the disease. The invasion and long-term persistence of parasites in various organs and tissues lead to the development of a broad spectrum of clinical symptoms. These manifestations are associated with the mechanical impact of parasites on host tissues, their metabolic and secretory activity, and the induction of toxic-allergic and immunopathological reactions. Mechanical damage may include obstruction, tissue irritation, and disruption of normal organ function, while parasite-derived metabolites and antigens can provoke inflammatory responses and alter immune regulation. A key factor in the survival and widespread distribution of parasites is their high reproductive potential combined with complex adaptive mechanisms. These include the ability to modulate host immune responses, evade immune detection, and adapt to the internal environment of the host. Such strategies promote prolonged persistence of the parasite, often resulting in a chronic course of infection. Over time, chronic parasitic invasion may contribute to the development of functional disorders in various organs and systems.