Table 3.

Evaluation of sera from Plasmodium vivax-infected individuals with high and intermediate levels of transmission-blocking (TB) activity against heterologous P. vivax parasites

Code of sera with TB activity 90–100%	Transmission-blocking activity (%)				Code of sera with TB activity 50–89%	Transmission-blocking activity (%)
	Autologous parasite*	Heterologous parasite†				Autologous parasite*	Heterologous parasite†
		1	2	3			1	2	3
54	100	100	100	nd	360	89.4	3.0	−206.1	17.1
70	100	100	90.4	nd	368	89.2	20.5	−94.4	80.3
68	100	100	81.3	nd	471	88.0	95.4	83.2	90.8
76	100	100	78.0	nd	360	87.4	57.8	88.0	32.4
107	100	100	37.8	nd	353	86.8	24.9	−35.6	50.7
168	100	55.0	64.3	nd	366	83.1	41.0	−81.6	55.8
79	100	80.9	39.8	nd	71	82.0	88.1	59.5	nd
333	100	100	96.9	100	278	59.6	100	100	100
385	100	99.6	93.6	93.0	345	58.7	81.1	48.0	99.3
370	100	51.1	98.4	55.4	346	57.9	100	65.4	97.4
372	100	80.3	97.8	100	349	53.5	6.6	−142.0	2.4
477	100	−75.7	100	41.5	468	53.3	93.8	98.7	78.5
357	100	15.6	15.4	56.1
463	100	83.9	100	95.2
362	99.7	17.8	−76.6	41.5
402	99.6	36.3	13.1	53.8
288	98.7	100	100	100
340	98.0	100	100	94.8
341	98.0	100	−15.7	100
453	98.0	67.4	97.3	60.0
383	97.1	65.5	100	79.0
451	96.2	100	91.7	83.0
280	95.7	91.9	61.9	100
412	95.7	79.0	30.5	84.7
352	92.1	nd	−91.4	42.7

^*Percentage of TB activity of sera using autologous P. vivax parasite.

^†Numbers (1, 2, 3) correspond to different parasite samples (heterologous strains) used for the three TB assays; nd = not determined.