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  Indian J Med Microbiol
 

Figure 2: The linear structure had two hyperechoic linear strips on either side of the longitudinal anechoic lumen representing fluid filled alimentary canal of the worm (“double tube sign” or “inner tube sign”)

Figure 2: The linear structure had two hyperechoic linear strips on either side of the longitudinal anechoic lumen representing fluid filled alimentary canal of the worm (“double tube sign” or “inner tube sign”)