Tetanus. 1  Tetanus, commonly called lockjaw, is caused by a bacterium that is mostly present in soil, manure, and in the digestive tracts of animals and humans. 2  Tetanus is not contagious and cannot be transmitted from person to person. Tetanus, commonly called lockjaw, is caused by a bacterium that is mostly present in soil, manure, and in the digestive tracts of animals and humans.
Sources of Lead. A child's environment is full of lead. Children are exposed to lead from different sources (such as paint, gasoline, solder, and consumer products) and through different pathways (such as air, food, water, dust, and soil). Although there are several exposure sources, lead-based paint is the most widespread and dangerous high-dose source of lead exposure for young children. Sources of Lead Artificial Turf
The modern English word lead is of Germanic origin; it comes from the Middle English leed and Old English lÄad (with the macron above the e signifying that the vowel sound of that letter is long).