Table 3.

SFV persistence^a

Individual	Age at sampling (yr)	Infection status	No. of virus strains	No. of virus strains transmitted	Time between samplings (yr)	Virus yr based on no. of strains and time between samplings	Virus stability (yr)
Gogol	10	Single infection
Gogol	17	Single infection	1	1	7	7	7
Kabisha	24	Superinfection
Kabisha	25	Superinfection	2	2	1	2	2
Kinshasa	11	Single infection
Kinshasa	17	Single infection	1	1	6	6	6
Rubra	31	Single infection
Rubra	35	Superinfection	1	1	4	4	4
Rubra	38	Superinfection	2	2	3	6	6
Sagu	13	Single infection
Sagu	17	Superinfection	1	1	4	4	4
Sagu	19	Superinfection	2	1	2	4	2
Sumatra	38	Single infection
Sumatra	40	Superinfection	1	1	2	2	2
Utan	7	Single infection
Utan	11	Single infection	1	1	4	4	4
Yucca	32	Superinfection
Yucca	34	Superinfection	2	2	2	4	4
Zyon	37	Superinfection
Zyon	42	Superinfection	2	2	5	10	10
Zyon	44	Superinfection	2	2	2	4	4
Total					42	57	55
Persistence (%)							96

^aIndividuals for which multiple samples were available were tested for virus stability. Strains identified in the earlier samples were compared with strains found in the later corresponding sample. A virus strain was defined using network-based analysis [identification of the founder sequence(s)/group of closely related sequence in the absence of the founder sequence]. Strains were defined as stable in the consecutive sample(s) if sequences revealed a maximal distance of 0.7% observed divergence (up to 3 bp difference). Of note, estimation of the number of independent infection events is a minimum estimate.