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Variations in microfilariae and infective stages of two types of Wuchereria bancrofti from the Thai-Myanmar border

Published online by Cambridge University Press:  11 April 2024

A. Jitpakdi ,
W. Choochote ,
P. Panart ,
D. Insun ,
K. Panart ,
B. Pitasawat  and
S. Prajakwong
A. Jitpakdi*
Affiliation:
Department of Parasitology Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand
W. Choochote
Affiliation:
Department of Parasitology Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand
P. Panart
Affiliation:
Vector Borne Disease Control Center 27, Chiang Mai, 50180, Thailand
D. Insun
Affiliation:
Department of Parasitology Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand
K. Panart
Affiliation:
The Office of Vector Borne Disease Control 2, Chiang Mai, 50200, Thailand
B. Pitasawat
Affiliation:
Department of Parasitology Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand
S. Prajakwong
Affiliation:
The Office of Vector Borne Disease Control 2, Chiang Mai, 50200, Thailand
*
*Fax: 66 53 217144.
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Abstract

Comparative morphometric and morphological studies of microfilariae and infective stages were undertaken in nocturnally periodic and subperiodic Wuchereria bancrofti. For microfilariae, the body dimensions of nocturnally periodic (NP) were significantly smaller than nocturnally subperiodic (NSP), i.e. body length 268.03 ± 14.75 μm (NP), 307.61 ± 11.52 μm (NSP); cephalic space length 4.21 ± 0.62 μm (NP), 5.32 ± 0.79 μm (NSP); head to nerve ring 49.39 ± 5.43 μm (NP), 57.40 ± 4.46 μm (NSP); innenkörper length 33.05 ± 5.89 μm (NP), 44.02 ± 8.71 μm (NSP); cephalic space width 4.28 ± 0.59 μm (NP), 6.04 ± 0.68 μm (NSP); body width at nerve ring 5.01 ± 0.57 μm (NP), 7.45 ± 0.75 μm (NSP). The number of nuclei between the cephalic space and nerve ring of NP (66.67 ± 5.19) was also significantly less than in NSP (94.74 ± 6.95). For infective stages, the body dimensions of NP were significantly smaller than NSP, i.e. body length 1632.50 ± 131.48 μm (NP), 2002.63 ± 222.60 μm (NSP); head to nerve ring 103.09 ± 7.47 μm (NP), 122.44 ± 9.62 μm (NSP); head to oesophago-intestinal junction 567.69 ± 94.84 μm (NP), 666.75 ± 110.08 μm (NSP); body width at oesophago-intestinal junction 23.15 ± 1.55 μm (NP), 26.78 ± 1.62 μm (NSP). It is too early to infer the NP type as an additional sibling species of W. bancrofti but it is reasonable to treat it as a new variety and additional work is needed to clarify its status.

Type
Research Article
Information
Journal of Helminthology , Volume 73 , Issue 4 , April 1999 , pp. 317 - 321
Copyright
Copyright © Cambridge University Press 1999

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