observations on the occurrence of five species of gasterophilus larvae in free-ranging horses in umbria, central italy.comparative data collected over 4 years show the most frequent species of gasterophilus infesting free-ranging horses in umbria (central italy) to be g. intestinalis (93.8%), g. nasalis (76.5%) and g. inermis (71%). g. pecorum and g. haemorrhoidalis were less frequent and appeared in 39.3 and 10.8% of the animals, respectively. for each of the 5 species, the duration of gastric and enteric lesions, the average numbers of larvae isolated throughout the year and the probable duration of oral lesio ...19892741303
classification of the main macroscopic lesions produced by larvae of gasterophilus spp. (diptera:gasterophilidae) in free-ranging horses in umbria.listed and described herein are the main macroscopic lesions produced along the whole digestive tract of free-ranging horses by larvae of the five gasterophilus spp., occurring in umbria, a region of central italy: gasterophilus intestinalis, gasterophilus nasalis, gasterophilus pecorum, gasterophilus inermis, gasterophilus haemorrhoidalis. lesions are classified on the basis of their sizes and shapes and the host's anatomic sites infested, and they are examined in relation to the developmental ...19883335129
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