TABLE 1.
Characteristics of cluster-associated strains of L. monocytogenes from human sources
| Cluster | No. of strains | Place of isolation (region) | Date of isolation
|
Serotype | AscI pulsotype (no. of strains) | EC marker | |
|---|---|---|---|---|---|---|---|
| First case | Last case | ||||||
| I | 4 | Lombardy | 11 May 2006 | 6 February 2007 | 1/2b | 1A (3), 1B (1) | |
| II | 5 | Lombardy | 7 July 2006 | 2 August 2006 | 1/2a | 2 | |
| III | 6 | Lombardy/Tuscany | 17 November 2006 | 2 November 2007 | 4b | 3 | |
| IV | 2 | Lombardy/Tuscany | 12 January 1996 | 27 July 2005 | 1/2a | 4 | |
| V | 3 | Lombardy | 11 December 2006 | 31 October 2007 | 1/2a | 5 | |
| VI | 3 | Lombardy | 29 July 2006 | 14 September 2006 | 1/2a | 7A (2), 7B (1) | III |
| VII | 2 | Lombardy | 19 March 2005 | 21 March 2005 | 1/2a | 8 | |
| VIII | 7 | Lombardy/Tuscany | 25 July 2005 | 13 July 2007 | 4b | 6A (3), 6B (2), 6C (1), 6D (1) | I |
| IX | 3 | Lombardy | 19 July 2006 | 15 September 2007 | 4b | 19 | II |
| X | 2 | Lombardy | 11 October 2000 | 18 May 2007 | 1/2a | 20 | |
| XI | 2 | Lombardy | 18 May 2006 | 4 September 2007 | 4b | 10 | |