The term glomerulonephritis (GN) covers a group of conditions in which there is injury in the glomerulus, the filtering unit of the kidney. This can occur either as a primary glomerular disease, or secondary to drugs, infections or tumours (see Secondary Glomerular Disease, pp 464â466 of this issue).
As insects are spiders' main prey, it is likely that they would impose strong selectional forces on the foraging behavior of spiders. Most commonly found in the sheet-web spider families, some webs will have loose, irregular tangles of silk above them.
One spiderâs diet consists entirely of plants. This spider, found in Central America and Mexico, is the only one known to prefer eating plants over animals or other insects. It loves eating the tips of the acacia plant, which has no natural defense against predators. Because of this, the spider isnât the only creature that eats the plantâsome ants do too.