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Table 1 PCR results among microscopy-diagnosed Plasmodium malariae/ Plasmodium knowlesi* , Plasmodium falciparum and Plasmodium vivax mono-infections, and mixed species infections, July 2011-December 2013

From: Changing epidemiology of malaria in Sabah, Malaysia: increasing incidence of Plasmodium knowlesi

  Microscopy result  
PCR result Pm/Pk* Pf Pv Mixed infections Total
Pk 924 (85) 32 (21) 33 (38) 23 (56) 1012
Pf 30 (2.8) 101 (65) 2 (2.3) 3 (7.3) 136
Pv 43 (4.0) 4 (2.6) 42 (48) 7 (17) 96
Pm 7 (0.6) 0 (0) 0 (0) 0 (0) 7
Pk/Pv 2 (0.2) 1 (0.1) 0 (0) 0 (0) 3
Pk/Pf 3 (0.3) 0 (0) 0 (0) 0 (0) 3
Pf/Pv 0 (0) 0 (0) 2 (2.3) 0 (0) 2
Pf/Pm 1 (0.1) 0 (0) 0 (0) 0 (0) 1
P. genus # 31 (2.9) 9 (5.8) 3 (3.4) 6 (15) 49
Negative 41 (3.8) 9 (5.8) 5 (5.7) 2 (4.9) 57
Total 1082 156 87 41 1366
  1. Numbers are N (%). Microscopy results were obtained from data provided on the PCR request form. Only PCR request forms that stated a species-specific microscopy result (67% of request forms) were included in this analysis. Pk = P. knowlesi, Pf = P. falciparum, Pv = P. vivax, Pm = P. malariae.
  2. *Microscopic diagnoses of P. knowlesi and P. malariae were considered as a single group.
  3. #Samples found to be Plasmodium-positive by PCR but negative in the species-specific PCR assays.