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Table 1 Baseline characteristics of study subjects by age group

From: Stool microbiota composition is associated with the prospective risk of Plasmodium falciparum infection

Characteristic Age Group All (n = 200)
  3–5 mo (n = 26) 6 mo–1 y (n = 41) 2–5 y (n = 37) 6–11 y (n = 44) 12–17 y (n = 24) 18–25 y (n = 28)  
Female gender 11 (42 %) 26 (63 %) 16 (43 %) 23 (52 %) 11 (46 %) 19 (68 %) 106 (53 %)
Bambara ethnicity 21 (81 %) 37 (90 %) 32 (86 %) 38 (86 %) 22 (92 %) 24 (86 %) 174 (87 %)
P. falciparum PCR positive at enrollmenta 0 (0 %) 10 (24 %) 11 (30 %) 4 (9.1 %) 16 (67 %) 14 (50 %) 55 (28 %)
P. malariae PCR positive at enrollment 0 0 0 0 1 (4.2 %) 0 1 (0.5 %)
Stool PCR for intestinal helminths (number positive/number tested)
A. duodenale     0/15 0/24 0/28 0/67
A. lumbricoides     0/11 0/24 0/28 0/63
N. americanus     0/22 0/24 1/28 (3.6 %) 1/74 (1.4 %)
S. stercoralis     0/11 0/24 0/28 0/63
T. trichura     0/11 0/24 0/28 0/63
Kato-Katz for intestinal and urinary helminths (number positive/number tested)
S. mansoni (stool) 0/24 0/40 0/37 0/44 0/24 0/28 0/197
H. nana (stool) 0/24 0/40 0/37 0/44 0/24 0/28 0/197
S.haematobium (urine) 2/19 (11 %) 1/39 (2.6 %) 0/37 (0 %) 1/43 (2.3 %) 2/16 (12 %) 7/22 (32 %) 13/176 (7.4 %)
Hb type
AA 23 (88 %) 35 (85 %) 29 (78 %) 38 (86 %) 22 (92 %) 19 (68 %) 166 (83 %)
AC 1 (3.8 %) 3 (7.3 %) 6 (16 %) 2 (4.5 %) 1 (4.2 %) 3 (11 %) 16 (8 %)
AS 2 (7.7 %) 3 (7.3 %) 2 (5.4 %) 4 (9.1 %) 1 (4.2 %) 5 (18 %) 17 (8.5 %)
SC 0 0 0 0 0 1 (3.6 %) 1 (0.5 %)
Hemoglobin, g/dL (95 % CI) 11.0 (10.7 – 11.3) 10.2 (9.9 – 10.6) 11.1 (10.8 – 11.5) 12.3 (12.0 – 12.6) 13.0 (12.6 – 13.4) 13.5 (12.9 – 14.0) 11.7 (11.5 – 12.0)
  1. aBefore the malaria season and at time of stool collection. All P. falciparum-infected subjects at the time of enrollment were asymptomatic