TABLE 4.

Distribution and relative numbers of GSEF PFGE types

Farm	Origin	PFGE type	No. of isolates
			Fall 1998	Spring 1999	Fall 1999
399	Farmer	5B	2
		22, 22A	2		9
		23	1
		24		5
		25		1
		26		2
		27		1
	Poultry	5c	2
		27, 27A		1	2
		28	2
		29	3
		30		1
		31		1
		32		1
		33		1
		34		1
		35, 35A		1	1
		36		1	2
		37			1
		38			1
64	Farmer	39	9
		40	1
		41		9
		42		1
		43			3
		44			1
	Poultry	22			2
		40A		1
		45, 45A	1,a 2		4
		46	1
		47		1
		48			1
		49			1
		50			1
		51			1
		52			1

^aRelative number of PFGE type 45A isolates. PFGE type 45 was isolated in F99 and F98, with the related type 45A only recovered in F98.