Diagnostic imaging in terrestrial invertebrates: Madagascar hissing cockroach (Gromphadorhina portentosa), desert...

Limited veterinary information is available for invertebrates. The purpose of this study was to improve baseline knowledge of invertebrate radiology and radiographic anatomy by evaluating diagnostic imaging modalities in six terrestrial invertebrate species. For each species, variably sized individuals were radiographed using multiple techniques to obtain optimal images, and radiographic technique charts were formulated using this data. To evaluate anatomy and compare gastrointestinal transit information among carnivores, omnivores, and herbivores, gastrointestinal contrast radiography was employed. Individuals were fed radiographic contrast media or contrast-containing food items. Contrast radiography resulted in improved visualization of gastrointestinal anatomy in all species. Radiographic contrast media was visualized in gastrointestinal tracts in at least one individual of all taxa for greater than 60 days, substantially longer than expected. Survey and gastrointestinal contrast radiographs of cockroaches were superior to those studies in other species. Zoo Biol 27:109-125, 2008. (c) 2008 Wiley-Liss, Inc.