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Table 4

Molecular identification of parasites in selected Culicoides biting midges (Parous) collected from Chiang Mai and Nakhon Si Thammarat provinces, Thailand, February–July 2024.

Culicoides species Number of biting midges
Parasite species (insect code)
Chiang Mai
Nakhon Si Thammarat
SS DS HD Total NB NT TS Total
C. asiana 32 (5, 0)1 22 (5, 0) 38 (10, 0) 92 (20, 0) 12 (5, 0) 5 (5, 0) 9 (5, 0) 26 (15, 0)
C. peregrinus 215 (20, 0) 198 (18, 0) 124 (12, 0) 537 (50, 0) 163 (10, 0) 206 (20, 0) 236 (20, 0) 605 (50, 0)
C. innoxius 223 (20, 0) 135 (10, 0) 123 (10, 0) 481 (40, 0) 282 (20, 0) 169 (15, 0) 196 (20, 0) 647 (55, 0)
C. arakawae 238 (20, 1) 128 (10, 0) 195 (20, 0) 561 (50, 1) 108 (10, 0) 65 (10, 0) 53 (10, 0) 226 (30, 0) Leucocytozoon caulleryi (SS15)
C. mahasarakhamense 248 (30, 4) 142 (20, 3) 191 (20, 0) 581 (70, 7) 59 (10, 0) 45 (10, 0) 33 (10, 0) 137 (30, 0) Leucocytozoon sp. (SS1, SS9, SS30, DS7, DS8, DS9)
Plasmodium juxtanucleare (SS25)
C. oxystoma 110 (10, 0) 68 (10, 0) 86 (10, 0) 264 (30, 0) 34 (15, 0) 37 (15, 0) 51 (20, 2) 122 (50, 2) Leucocytozoon sp. (TS4, TS7)
C. palpifer 51 (5, 0) 35 (5, 0) 35 (5, 0) 121 (15, 0) 48 (5, 0) 32 (5, 0) 38 (5, 0) 118 (15, 0)
C. huffi 29 (5, 0) 17 (5, 0) 20 (5, 0) 66 (15, 0) 49 (5, 0) 19 (5, 0) 37 (5, 0) 105 (15, 0)
C. shortti 45 (5, 0) 30 (5, 0) 11 (5, 0) 86 (15, 0) 27 (5, 0) 14 (5, 0) 7 (5, 0) 48 (15, 0)
C. guttifer 40 (10, 0) 19 (10, 2) 34 (10, 0) 93 (30, 2) 3 (2, 0) 18 (10, 0) 28 (15, 1) 49 (27, 1) Leucocytozoon sp. (DS3, DS4, TS1)
C. fulvus 6 (4, 0) 15 (12, 2) 28 (13, 0) 49 (29, 2) 9 (8, 0) 28 (16, 0) 23 (9, 0) 60 (33, 0) Leucocytozoon sp. (DS5, DS6)
C. orientalis 13 (5, 0) 2 (2, 0) 7 (5, 0) 22 (12, 0) 0 0 0 0
C. fordae 0 0 0 0 45 (5, 0) 67 (7, 0) 26 (5, 0) 138 (17, 0)
C. insignipennis 0 0 0 0 4 (2, 0) 7 (3, 0) 0 11 (5, 0)
Culicoides sp. (unknown) 0 0 30 (5, 0) 30 (5, 0) 0 0 0 0
Total 1,250 811 922 2,983 843 712 737 2,292

Abbreviations: San Sai (SS); Doi Saket (DS); Hang Dong (HD); Na Bon (NB); Nopphitam (NT); Tha Sala (TS).

1

The numbers inside the brackets represent the number of dissected parous insects (front) and the number of parous insects that were found to be positive for parasite (behind).

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