Table 1.
Country, year | Criteria for identifying asymptomatic cases | Study subjects (sample size) | Follow-up protocol, duration | References |
---|---|---|---|---|
Cameroon, 2009 | Positive thick blood smear and afebrile. No history of fever and antimalarial treatment in the previous 1 and 2 weeks, respectively, at the time of mass screening | Children <12 years (13) | No follow-up | (5) |
Mali, 2011 | PCR-detected P. falciparum and no fever. No history of antimalarial or immunosuppressive medication in the last 30 days and helminths | Individuals >13 (5) | Bi-weekly and weekly surveillance for Plasmodium infection and malaria episode, respectively | (14) |
Gabon, 2005 | Thin and thick blood smear and no clinical symptoms | Children 0.5–6 years (ND) | Follow up for 5 consecutive days | (6) |
Uganda, 2007–2008 | Blood smear and no fever | Children 4–5 years (15) | Follow up for 7 days | (16) |
Mali, 2006 | Not defined | 5–13 years (17) | Healthy baseline before the malaria season, 7 or 14 days after treatment of their first malaria episode of the ensuing malaria season, and a subset of children followed up to the 6-month dry season | (18) |