Zone

Region

State

Sample number

Clinical story

Centre

1

Mexico City

176

Herds with respiratory problems

Centre

2

EdoMex

91

3

130

Centre

4

Guanajuato

1

5

73

6

33

Centre

7

Morelos

103

Southeast

8

Guerrero and Oaxaca

203

Northwest

9

BCS

17

Herd without respiratory problems