HUMAN INFECTION WITH PIG ASCARIS (A-SUUM)
HUMAN INFECTION WITH PIG ASCARIS (A-SUUM)
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DOI：
10.1080/00034983.1971.11686733
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发表时间：
1971-01-01
影响因子：
--
通讯作者：
SMITH, DH
中科院分区：
文献类型：
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作者：
CREWE, W;SMITH, DH
1969年6月，一只成年蛔虫被一只婴儿传染，并被带到我们这里进行鉴定。这个孩子生活在卫生的环境中，但他的父母使用当地养猪场的新鲜粪便作为花园肥料，有几次看到这个孩子吃花园里的土。因此，人们认为这种感染可能是猪源性的，并对蠕虫进行了检查，试图确定它是否是A。lumhricoides或A. suum。在形态上区分这两个物种的唯一方法是通过检查含齿脊上的牙齿（Sprent，1952），这种检查表明，孩子通过的蠕虫是A。suum。由于人感染猪蛔虫据说是罕见的，因此，我们从利物浦热带医学院的教学收藏中随机抽取蛔虫标本，分别从猪和人身上获得蛔虫标本，以检验斯普伦特特征的可靠性。这些标本的牙齿与斯普伦特的描述一致。这三种蠕虫的含牙嵴上的牙齿形态如图III所示。图Ia和1b来自人类蛔虫，显示了Sprent描述的牙齿的凹面。图za和zb为猪蛔虫，均为直边三角形齿。图图3a和图3b来自儿童经过的蜗杆，显示了与A相关的典型三角形齿。suum。
In June 1969 a single adult Ascaris was passed by an infant, and was brought to us for identification. The child lived in hygienic surroundings, but his parents used fresh manure from a local pig farm as a garden fertilizer, and on several occasions the child had been seen to eat earth from the garden. It was therefore thought that the infection might possibly have been of porcine origin, and the worm was examined in an attempt to determine whether it was A. lumhricoides or A. suum. The only described way of distinguishing morphologically between these two species is by examining the teeth on the dentigerous ridges (Sprent, 1952) and such examination suggested that the worm passed by the child was A. suum. As infections of man with pig Ascaris are reputedly rare, the reliability of Sprent's characters was checked by taking at random specimens of Ascaris from the teaching collection at the Liverpool School of Tropical Medicine which had been obtained from pig and man respectively. The teeth of these specimens agreed with Sprent's descriptions. The morphology of the teeth on the dentigerous ridges of the three worms is shown in Plate III. Figs. Ia and 1b are from human Ascaris, and show the concave sides to the teeth described by Sprent. Figs. za and zb are from pig Ascaris, and show the straightersided triangular teeth. Figs. 3a and 3b are from the worm passed by the child, and show the typical triangular teeth associated with A. suum.