[Morphological observation on the adult worms of Taenia saginata in western China].
OBJECTIVE
To investigate the morphological characteristics of the adult worms of Taenia saginata from four areas of Western China.


METHODS
42, 41, 7 and 18 integral worms of Taenia saginata were collected from Duyun and Congjiang of Guizhou Province, Wushi of Xinjiang, and Lhasa of Tibet respectively. The length of worms was measured and the segments were counted. The specimens of scolex, mature and gravid proglottids of the worms were stained, measured and photographed.


RESULTS
The mean length of the worms from Duyun, Congjiang, Wushi and Lasa was (1.81+/-0.69) m, (3.84+/-1.32) m, (2.76+/-0.86) m and (3.72+/-1.12) m, and with (574.64+/-189.33), (913.84+/-317.41), (971.29+/-168.30) and (940.38+/-368.26) proglottids, respectively. The mean ratio of the distance between two lateral excretory vessels and the length of vitellarium of the mature proglottids was (1.71+/-0.13), (2.23+/-0.06), (2.03+/-0.21), (2.31+/-0.15) respectively. All the 3 parameters of the worms from Duyun were significantly less than those from other 3 areas (P<0.05). Rudimentary rostellum was found obviously in 3 of 10 scolices of the worms from Duyun.


CONCLUSIONS
The morphological characteristics of the adult worms from Duyun are similar to that of Taenia saginata asiatica, while those of the worms from Congjiang, Wushi and Lhasa are alike to those of Taenia saginata saginata.
Mou
Rong
R
Department of Parasitology, Guiyang Medical College, Guiyang 550004, China.
Bao
Huai-En
HE
Qiu
Xue-Li
XL
Chen
Yan
Y
Lang
Shu-Yuan
SY
Huang
Jiang
J
Li
Jian-Hua
JH
Zhu
Wu-Jun
WJ
Zhang
Ke
K
Ling-Hu
Yan
Y
D000818:Animals; D002681:China; D003551:Cysticercosis / Q000469:parasitology*; D006801:Humans; D010270:Parasite Egg Count; D041202:Taenia saginata / Q000033:anatomy & histology* / Q000302:isolation & purification; D013622:Taeniasis / Q000469:parasitology*