Indusium: the case made by an insect larva: a membranous layer of the embryo of Locustidae below the serosa. Explanation of Terms Used in Entomology John. B. Smith. serosa: the outer membrane that envelops the forming embryo, the amnion and the remainder of the egg. Explanation of Terms Used in Entomology John.
In essence, your body forms an allergic reaction to stress. Unfortunately, stress can not be eliminated with histamine, so instead, the histamine just causes hives to appear on your face, neck, chest and other parts of your body.
1 Raised, red, itchy bumps called hives and reddening of the skin. 2  These symptoms often occur with other symptoms of a severe reaction. 3  A toxic reaction to a single sting or bite. 4  Spiders or insects that may cause this include: 5  Black widow spider. Serum sickness, a reaction to the medicines (antiserum) used to treat a bite or sting. 2  Serum sickness may cause hives and flu-like symptoms about 3 to 21 days after the use of antiserum. 3  A virus infection. 4  Infected mosquitoes can spread the West Nile virus to people, causing an inflammation of the brain (encephalitis).