Setaria bernardi及Setaria cervi絲狀蟲形態之比較

Comparisons of Morphological Properties of Setaria Bernardi and Setaria cervi

董光中(Kwong-Chung Tung) ； 邱雲棕(Yung-Tsung Chiu) ； 王俊秀(Jiunn-Shiow Wang)

《臺灣獸醫學雜誌》 29卷1期 (2003/03) Pp. 41-45

https://doi.org/10.7009/TVJ.200303.0041

摘要

台灣地區有四種Setaria屬絲狀蟲，分別寄生於牛、羊、野山豬及鹿。以頭端齒狀突起及尾端形態區分Setaria屬絲狀蟲為主要區分依據。本研究以光學及電子顯微鏡觀察此二種頭端形態相似之Setaria屬絲狀蟲並進而比較其異同，以期提供區別鑑定之用。自野山豬及梅花鹿之腹腔檢出之絲狀蟲經光學顯微鏡觀察鑑定，其結果為S. bernardi及S. cervi。二者頭端皆呈鈍圓，具有4個齒狀突。S. bernardi 尾末端呈多棘狀突起，而S. cervi尾末端呈球狀突起。因此，需同時以頭端及尾端特點區分S. cervi與S. bernardi之成蟲，但以尾端差異較佳。以電子顯微鏡觀察頭端，S. cervi具有4個齒狀突起分散於呈等距之四角落，而S. bernardi則分散於呈長方形距之四角落，此為二者最佳之區分特徵。本研究提供研究者若發現僅有頭端時，可經由電子顯微鏡觀察而確認此二種成蟲。另外，S. bernardi為首例在台灣野山豬之腹腔檢出。

關鍵字

台灣梅花鹿 ； 台灣野山豬

並列摘要

Up to date, four different species of genus Setaria (Setaria digitata, S. marshalli, S. cervi and S. bernardi) have been reported from cattle, goat, Formosan Sika deer and Formosan wild boar in Taiwan. Tips of peribuccal crown of head end and the morphology of tail end are the key points to identify these parasites. Despite that the tips of peribuccal crown of head end was similar between S. cervi and S. bernardi, their morphological significance has not been well defined. Techniques of light and electronic microscopes (L. M. and E. M.) were applied to distinguish the morphological differences of these two Setaria species. Results showed the parasites collected from Formosan wild boar and Formosan sika deer peritoneal cavity were confirmed to be S. bernardi and S. cervi by L. M. These two parasites both have blunt-round head and four tips of peribuccal crown; and the tail end of S. bernardi mostly covered with many short spines, meanwhile the S. cervi was spherical knob. Thus, the characters of both head and tail are requisites for identifying S. bernardi and S. cervi in adult female worm; however, the tail differences play a key role to identify the differences. Under E. M. observation, the four tips of peribuccal crown of S. cervi placed at four corners in equal distance (Iike a square); and the ones of S. bernardi were also at four corners but in different distance (like an oblong), that's the major difference. Our research provided a method to identify these two species of parasites by E. M. while only the head end was obtained; besides, S. bernardi was found in the peritoneal cavity of Formosan wild boar was the first case in Taiwan.

並列關鍵字

Fromosan sika deer ； Formosan wild boar ； Setaria bernardi ； Setaria cervi