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Volume 17, Number 10—October 2011

Research

Plasmodium knowlesi Malaria in Humans and Macaques, Thailand

Somchai JongwutiwesComments to Author , Pattakorn Buppan, Rattiporn Kosuvin, Sunee Seethamchai, Urassaya Pattanawong, Jeeraphat Sirichaisinthop, and Chaturong Putaporntip

Author affiliations: Chulalongkorn University, Bangkok, Thailand (S. Jongwutiwes, P. Buppan, R. Kosuvin, U. Pattanawong, C. Putaporntip); Naresuan University, Phitsanulok, Thailand (S. Seethamchai); Vector Borne Disease Training Center, Saraburi, Thailand (J. Sirichaisinthop)

Main Article

Table 2

Distribution of Plasmodium species by malaria-endemic areas of Thailand, October 2008–September 2009*

Infection Region, no. (%)
Total no. (%)
Northwestern (Tak) Eastern (Chantaburi) Southern (Yala) Southern (Narathiwat)
Monoinfection 989 (81.33) 351 (87.53) 1,297 (92.12) 352 (83.61) 2,989 (86.74)
P. falciparum 507 (41.69) 27 (6.73) 810 (57.53) 212 (50.36) 1,556 (45.15)
P. vivax 481 (39.56) 320 (79.80) 485 (34.45) 136 (32.30) 1,422 (41.27)
P. malariae 1 (0.08) 1 (0.25) 0 1 (0.24) 3 (0.09)
P. ovale 0 0 0 0 0
P. knowlesi
0
3 (0.75)
2 (0.14)
3 (0.71)
8 (0.23)
Co-infection 227 (18.67) 50 (12.47) 111 (7.88) 69 (16.39) 457 (13.26)
P. falciparum and P. vivax 217 (17.85) 46 (11.47) 105 (7.46) 64 (15.20) 432 (12.54)
P. falciparum and P. malariae 1 (0.08) 0 0 1 (0.24) 2 (0.06)
P. falciparum and P. ovale 2 (0.16) 0 1 (0.07) 0 3 (0.09)
P. falciparum and P. knowlesi 2 (0.16) 0 3 (0.21) 1 (0.24) 6 (0.17)
P. vivax and P. malariae 1 (0.08) 0 2 (0.14) 0 3 (0.09)
P. vivax and P. ovale 1 (0.08) 0 0 1 (0.24) 2 (0.06)
P. vivax and P. knowlesi 2 (0.16) 1 (0.25) 0 1 (0.24) 4 (0.12)
P. falciparum, P. vivax, and P. knowlesi
1 (0.08)
3 (0.75)
0
1 (0.24)
5 (0.15)
Total 1,216 401 1,408 421 3,446

*Data from nested PCR. Percentages are of the total number in that region or infection category.

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