EPIDEMIOLOGIC OBSERVATIONS ON GASTEROPHILUS-INTESTINALIS AND G-NASALIS IN DONKEYS FROM MOROCCO
EPIDEMIOLOGIC OBSERVATIONS ON GASTEROPHILUS-INTESTINALIS AND G-NASALIS IN DONKEYS FROM MOROCCO
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DOI：
10.1016/0304-4017(92)90087-p
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发表时间：
1992-03-01
影响因子：
2.6
通讯作者：
VERHULST, A
中科院分区：
文献类型：
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作者：
PANDEY, VS;OUHELLI, H;VERHULST, A
在24个月期间，对198头驴进行了胃蝇和鼻胃蝇幼虫检查。胃嗜热菌（Gasterophilus）的检出率为97.5%; 95.5%的驴有鼻肌。两种蛾的三龄幼虫（L3）在全年各月均有发生，二龄幼虫（L2）除4月外（G. nasalis）和May（G.（掌声）。超过75%的动物有多达200个幼虫，1.5%有超过600个幼虫。在任何动物中发现的L2和L3幼虫的最大数量为418 G。433 G.两个物种加起来有715只。幼虫数量和发育状况的季节变化表明，成蝇的最大活动期为成虫期。在8/9月至11月，G. nasalis从5月到9月。因此，胃中L2幼虫的数量高峰期在11月至次年1月。7月至9月间，G.鼻肌L_3幼虫的幼虫期为10天。在12月至7月间，黑腹小蜂的数量最多，而G.在十月到三月之间。1 ~ 3月，大部分的L2幼虫在幼虫期内发生。鼻肌被胃幽门端附近的息肉结节所困。结论：春末和秋季是驴胃蝇感染的高发期，冬季驴胃蝇幼虫负担重。
During a 24 month period, 198 donkeys were examined for Gasterophilus intestinalis and Gasterophilus nasalis larvae. Gasterophilus intestinalis was found in 97.5% and G. nasalis in 95.5% of donkeys. The third instars (L3) of both species occurred during all months of the year and so did the second instars (L2), except in April (G. nasalis) and May (G. intestinalis). Over 75% of the animals had up to 200 larvae and 1.5% had over 600 larvae. The maximum number of both L2 and L3 larvae found in any animal was 418 G. intestinalis, 433 G. nasalis and 715 of both species combined. The seasonal variation in the numbers and development status of larvae indicated that the period of greatest activity of adult flies of G. intestinalis was from August/September to November, and that of G. nasalis from May to September. Consequently, the L2 larvae in the stomachs were in peak numbers between November and January for G. intestinalis and between July and September for G. nasalis. The L3 larvae of G. intestinalis had peak numbers between December and July, and those of G. nasalis between October and March. During January-March, most of the L2 larvae of G. nasalis were trapped in polypous nodules near the pyloric end of the stomach. It is concluded that the high-risk period for infection is during late spring and autumn, leading to the heavy larval burden of Gasterophilus in the stomach of donkeys during winter.