What condition can arise from infections such as filariasis and amoebiasis?

Intestinal obstruction can arise from infections like filariasis and amoebiasis due to the potential for these infections to cause significant inflammation, swelling, or blockage in the intestines. Specifically, amoebiasis, caused by the Entamoeba histolytica parasite, can lead to lesions in the intestinal lining, potentially resulting in abscesses that disrupt normal bowel function. In cases of filariasis, the parasitic infection can lead to lymphatic damage and fluid accumulation in the abdomen, which may also contribute to obstructive symptoms.

Filariasis often causes a condition known as lymphatic filariasis, characterized by severe swelling and fluid buildup in limbs or the abdomen (called elephantiasis). This chronic condition can result in significant changes in tissue and may lead to blockages.

In contrast, myasthenia gravis is an autoimmune disorder affecting nerve signals to muscles, while phenylketonuria is a genetic disorder related to amino acid metabolism, and natality refers to birth rates, none of which are directly caused by the infections mentioned.