Isolation and Molecular Identification of Mycobacterium bovis from Slaughtered Cattle in Nekemte Municipality Abattoir, Ethiopia

Table 2

Methods of determining the age of cattle.

Years	Detailed description
At birth to 1 month	Two or more of the temporary incisor teeth present. Within first month, entire 8 temporary incisors appear
2 years	As a long yearling, the central pair of temporary incisor teeth or pinchers is replaced by the permanent pinchers. At 2 years, the central permanent incisors attain full development
2 and 1/2 years	Permanent first intermediates, one on each side of the pinchers, are cut. Usually, these are fully developed at 3 years
3 and 1/2 years	The second intermediates or laterals are cut. They are on a level with the first intermediates and begin to wear at 4 years
4 and 1/2 years	The corner teeth are replaced. At 5 years, the animal usually has the full complement of incisors with the corners fully developed
5-6 years	The permanent pinchers are leveled, both pairs of intermediates are partially leveled, and the corner incisors show wear
7–10 years	At 7 or 8 years, the pinchers show noticeable wear; at 8 or 9 years, the middle pairs show noticeable wear; and at 10 years, the corner teeth show noticeable wear
12 years	After the animal passed the 6th year, the arch gradually loses its rounded contour and becomes nearly straight by the 12th year. In the meantime, the teeth gradually become triangular in shape, distinctly separated, and show progressive wearing to stubs. These conditions become more marked with increasing age