. 2003 Jan;69(1):711–714. doi: 10.1128/AEM.69.1.711-714.2003

TABLE 1.

Colonization of 10 strains of Campylobacter cells treated with formic acid at pH 4 via two injection routes of SPF embryonated chicken eggs

Campylobacter strain^a	No. of fertilized eggs colonized^b/ no. of inoculated eggs
Campylobacter strain^a	Amniotic fluid	Yolk sac	Total
Treated group
C4596	0/3	0/3	0/6
C2150	0/3	0/3	0/6
C4601	0/3	0/3	0/6
C2146	3^**/3	3^***/3	6/6
C186	3^**/3	3^**/3	6/6
C350	3^**/3	3^**/3	6/6
C591	0/3	0/3	0/6
C690	0/3	0/3	0/6
C4602	2^**/3	2^**/3	4/6
C144	0/3	0/3	0/6
Formic solution (negative control)	0/3	0/3	0/6
Positive-control group
C4596	2^**/2	2^**/2	4/4
C2150	2^**/2	2^***/2	4/4
C4601	2^**/2	2^***/2	4/4
C2146	2^**/2	2^***/2	4/4
C186	2^**/2	2^***/2	4/4
C350	2^*/2	2^**/2	4/4
C591	2^*/2	2^**/2	4/4
C690	2^**/2	2^***/2	4/4
C4602	2^*/2	2^**/2	4/4
C144	2^*/2	2^*/2	4/4

C. coli strains C4596, C4601, and C4602 and C. jejuni strains C2150, C2146, C186, C350, C591, C690, and C144 were studied. Campylobacter strains are available from and were provided by the ID-DLO Institute of Animal Science and Health, Lelystad, The Netherlands.

The number of colonies formed is indicated as follows: ^*, less than 5 CFU per plate; ^**, between 6 and 50 CFU per plate; ^***, more than 51 CFU per plate.