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Table 1 Clinical aspects, infectivity mosquitoes and prevalence of asexual and sexual stages detected by microscopy and/or molecular biology tools in samples from symptomatic and asymptomatic malaria vivax patients

From: Infection of Anopheles aquasalis from symptomatic and asymptomatic Plasmodium vivax infections in Manaus, western Brazilian Amazon

  Symptomatic (n = 42) Asymptomatic (n = 25)
Male, n (%) 31 (74) 14 (56)
Age group (%)
 < 25 12 24
 25–34 24 28
 > 34 64 48
 Mean 39 34.7
Malaria previous episodes (%) 88 84
Mean of malaria episodes 4 9
Symptoms (%)
 Fever 93 0
 Headache 31 12
 Chills 52 0
No. of dissected guts, mean ± SD (range) 27.6 ± 13.3 (11–85) 28.5 ± 13.1 (7–60)
Oocyst intensity, mean ± SD (range) 7.8 ± 18.1 (0–70) 2.1 ± 7.3 (0–35)
Parasite density by microscopy (parasites/μl), mean ± SD (range)
Assexual forms, mean ± SD (range) 2454 ± 3148 (165–13,524) 249 ± 724 (0–3128)
Gametocytes, mean ± SD (range) 152 ± 130 (8–577) 13 ± 33 (0–151)
PCR parasite density (copies/μl)
18S rDNA, mean ± SD (range) 14,134 ± 75,180 (1446–478,640) 2446 ± 5495 (0.7–20,627)
Pvs25, mean ± SD (range) 8937 ± 31,745 (505–175,571) 2711 ± 3444 (1–10,858)
  1. Abbreviation: SD standard deviation