Table 1 Comparative morphometric data for Onchocerca borneensis n. sp. and congeners recorded from wild suids
Species | Onchocerca borneensis n. sp.a | Onchocerca dewittei dewittei Bain, Ramachandran, Petter & Mak, 1977 | Onchocerca dewittei japonica Uni, Bain & Takaoka, 2001 | Onchocerca takaokai Uni, Fukuda & Bain, 2015d | Onchocerca ramachandrini Bain, Wahl & Renz, 1993 |
|---|---|---|---|---|---|
Reference | Present study | Present study | Present study | [18] | [16] |
Host | Sus barbatus | Sus scrofa vittatus | Sus scrofa leucomystax | Sus scrofa leucomystax | Phacochoerus africanus |
Locality | Long Banga, Sarawak, Malaysia | Ulu Gombak, Selangor, Malaysia | Bungoono, Oita, Japan | Oita, Japan | Cameroon |
Female | (n = 8) | (n = 14) | (n = 3) | Holotype | Holotype |
Body length (cm) | 21.5 (17.5–21.5) | 30.7b | 16.7–27.3c | – | 12.8 |
Body width at midbody | 490 (410–590) | 220–320 | 260–430 | 110 | 210 |
Nerve-ring from anterior end | 193 (170–225) | 195–200 | 207–233 | 190 | 250 |
Oesophagus length | 975 (900–1288) | 988–1438 | 1020–1120 | 1270 | 1250 |
Vulva from anterior end | 513 (475–680) | 343–497 | 520–620 | 475 | 650 |
Distance of ridges at midbody | 17 (10–25) | 40–93 | 235–340 | Ridges absent | Longitudinal crests |
Ridges (height/width) at midbody | 5 (4–5)/10 (9–10) | 10–11/15–20 | 23–35/75–100 | – | – |
Cuticle thickness at midbody | 17 (10–36) | 20–40 | 13–33 | 8 | 15–20 |
Tail length | 258 (183–258) | 143–188 | 100–218 | 130 | 170 |
Microfilaria | (n = 10) | (n = 10) | (n = 10) | (n = 4) | (n = 11) |
Body length | 160–188 | 198–245 | 158–203 | 295–329 | 290–325 |
Body width | 5–6 | 5–8 | 5–6 | 6–9 | 7.0–7.5 |
Male | (n = 11) | (n = 2) | (n = 3) | – | (n = 2) |
Body length (mm) | 18 (16–24) | 42–45 | 51–54c | – | 32.3–34 |
Body width at midbody | 65 (50–110) | 88–93 | 100–113 | – | 65–72 |
Cuticular crests at midbody | Present | Present | Present | – | None |
Nerve-ring from anterior end | 225 (163–225) | 213 | 167–247 | – | 175–190 |
Oesophagus length | 1040 (800–1070) | 905 | 888–1007 | – | 1000–1050 |
Right spicule length (RS) | 63 (58–85) | 75–88 | 73–77 | – | 78 |
Left spicule length (LS) | 163 (125–198) | 223–245 | 223–250 | – | 220–240 |
Spicule length ratio (LS/RS) | 2.6 (2.1–2.8) | 2.8–3.0 | 3.1–3.3 | – | 2.9 |
Tail length | 70 (63–80) | 53–63 | 62–80 | – | 105–125 |
Parasitic location of adults | Footpads | Footpads | Footpads | Skin of head, neck and back | Subcutaneous connective tissues of feet |