In most of the rest of the world, anthrax in animals occurs only sporadically. In the United States, outbreaks in animals have occurred since 1990 in the Midwest (Kansas, Minnesota, Missouri, Nebraska, North Dakota, South Dakota), in the West (California, Nevada), and in Texas and Oklahoma (MBAH 2006, WHOCC).
lethargy (countable and uncountable, plural lethargies) ( 1 pathology) A condition characterized by extreme fatigue or drowsiness, or prolonged sleep patterns. 2  A state of extreme torpor or apathy, especially with lack of emotion or interest; loosely, sluggishness, laziness.
For example, muscles fatigue if the are called upon to repetitively work for an extended period. Most of the causes of tiredness are also associated with fatigue. A related term is lethargy. Lethargy refers to a state of lacking energy. People who are experiencing fatigue or tiredness can also be said to be lethargic because of low energy.