Development of the Bovine Eyeworm, Thelazia gulosa (Railliet and Henry), in Experimentally Infected, Female Musca autumnalis De Geer

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Abstract
Development of the eyeworm T. gulosa was observed in experimentally infected, female face flies (M. autumnalis). Following removal from bovine eyes obtained from local abattoirs, adult nematodes were dissected and larval parasites were fed to restrained, 5- to 7-day-old flies which were starved for 12 h. Larvae penetrated the midgut of the flies 1-4 h postinoculation (= PI). On day 3 PI, all live larvae were found in capsules attached to the abdominal body wall. No development was observed in unencapsulated larvae. Measurements of parasites on each of days 3, 6 and 9 PI are presented. Development to the 3rd-stage larva was completed by day 9.