The alimentary canal of <Emphasis Type="Italic">Blomia tropicalis</Emphasis> (Acari: Astigmata: Echymopodidae): the application of three-dimensional reconstruction technology |
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Authors: | Jie Wu Fengwei Yang Zhigang Liu Guihua Wu Pixin Ran |
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Institution: | (1) Institute of Allergy and Immunology, Shenzhen University, Shenzhen, China;(2) The State Key Laboratory of Respiratory Disease, Guangzhou Medical College, Guangzhou, China;(3) Shanghai Entomological Museum, Institute of Plant Physiology & Ecology, Chinese Academy of Sciences, Beijing, China;(4) Bengbu Medical College, Bengbu, China |
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Abstract: | The domestic mite species Blomia tropicalis is an important indoor allergen source related to asthma and other allergic diseases in tropical and subtropical regions.
Here, we describe the alimentary canal of B. tropicalis with the particular application of three-dimensional reconstruction technology. The alimentary canal of B. tropicalis resembles the typical acarid form consisting of the cuticle-lined foregut and hindgut separated by a cuticle-free midgut.
The foregut is divided into a muscular pharynx and an esophagus. The midgut is composed of a central ventriculus, two lateral
caeca, a globular colon and a postcolon with two tubiform postcolonic diverticula. The most common cells forming the epithelium
of ventriculus and caeca are squamous and cuboidal. The globular cells contain a big central vacuole in the posterior region
of the caeca. The epithelium of the colon and postcolon has significantly longer microvilli. The anal atrium is a simple tube
with flattened epithelial cells. The spatial measurements of the three-dimensional model suggest that the paired caeca and
central ventriculus occupy 55.1 and 34.6%, respectively, of the total volume of the alimentary canal and may play the key
role in food digestion.
J. Wu and F. Yang contributed equally. |
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Keywords: | Anatomical study Alimentary canal Blomia tropicalis Mite |
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