STUDIES ON THELAZIASIS OF CATTLE : I. THELAZIA SKRJABINI ERSCHOW, 1928 FOUND IN JAPAN

• Published in: Japanese journal of veterinary science Vol. 28; no. 1; pp. 11 - 16_2
• Main Authors: OKOSHI, Shin, KITANO, Noritoshi
• Format: Journal Article
• Language: Japanese; English
• Published: Japan JAPANESE SOCIETY OF VETERINARY SCIENCE 1966
• Subjects: Animals; Cattle; Cattle Diseases; Eye Diseases - veterinary; Japan; Parasitic Diseases, Animal; Spiruroidea; Japan
• ISSN: 0021-5295; 1881-1442
• DOI: 10.1292/jvms1939.28.11

Close examination was performed on the eyeballs of a 3-year-old Holstein cow which were slaughtered at the Mitaka Slaughter House in Tokyo on January 12, 1963. No worms were found in the conjunctival sac or under the third eyelid, but 7 worms (2 males and 5 females) of the genus Thelazia were in the lacrymal ducts. These worms were the first to be identified as Thelazia skrjabini in Japan from morphological observation. To ciarify the distribution of T. skrjabini in Japan, 96 cattle were examined when slaughtered at the Tokyo Metropolitan Slaughter House. They had been brought to Tokyo from 17 districts all over the country. A total of 16 worms (5 males and 11 fernales) of T. skrjabini were collected from 5 cattle raised in 2 prefectures (4 head in Chiba and 1 head in Ibaraki). Most of worms were harbored in the lacrimal ducts. Furthermore, 68 cows on Hachijo Island, 114 cows on Oshima Island, Tokyo Prefecture, 5 cows on the Niikappu National Breeding Stock Farm, Hokkaido, and 12 cows on the University of Tokyo Livestock Farm, Ibaraki Prefecture, were examined by a method in which pressure eye washing was carried out with physiological saline solution. 60 of the 199 cows examined harbored 226 worms of the genus Thelazia, of which 35 (15.4 percent) belonged to T. skrjabini. A part of this work was presented at the 55th semiannual meeting of the Japanese Society of Veterinary Science in 1963.