Table 5.
Circulation of Map strains in some bovine herds along time.
| SSR1_SSR8&SnaBI-SpeI PFGE profiles identified in different years (number of isolates in brackets) | ||||||
| Farm | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 |
| SS28 | 12_5/{54-49} (1) | - | - | 7_4/{2–19} (1) | - | - |
| SS38 | - | - | 13_5/{1-1} (1) | 14_5/{1-1} (1) | - | - |
| SS52 | - | - | 7_4/{2-1} (1) | 13_5/{1-1} (1) | 14_5/{1-1} (1) | - |
| SS5 | - | 8_5/{1-1} (1) | 11_5/{54-49} (1) 13_5/{1-1} (3) |
14_5/{1-1} (1) | - | - |
| SS27 | - | - | 13_5/{1-1} (2) | 7_4/{2-1} (2) 7_4/{59-63} (1) |
- | - |
| NA2 | - | - | - | - | 13_5/{1-1} (1) 14_5/{1-1} (1) |
13_5/{1-1} (2) 13_5/{62-1} (1) 14_5/{1-1} (7) 14_5/{1-53} (1) |
| SS23 | - | 7_4/{2-1} (1) 14_5/{54-49} (1) |
7_4/{2-1} (8) | - | 7_4/{2-1} (1) | - |
| BI2 | - | - | 7_4/{2-1} (1) | 7_4/{2-1} (2) | - | - |
| BI9 | - | - | 7_4/{2-1} (1) | - | 7_4/{2-1} (2) | 7_4/{2-1} (2) |
| HU1 | - | - | 7_4/{2-1} (1) | - | 7_4/{2-1} (1) | - |
| LE1 | - | 7_4/{2-1} (3) | 7_4/{2-1} (4) | - | - | - |
New strains turning up and within-herd spread of specific strains during time in some bovine Holstein farms as assessed by SSR/PFGE analysis combination. Strain variation along time seems to indicate three different epidemiologic situations: Farms with 100% strain variation (variable), farms with intermediate strain variation (intermediate) and farms carrying always the same types (stable).