Abstract
Based on the morphologic characteristics of oocysts of the genus Isosporn, we have demonstrated that I. ohioensis is a relatively common Isosporn species in dogs which are resident in Chonbuk province, Korea. The prepatent period of 1. ohioensis was four days. The size of the unsporulated oocysts in fresh stool specimens was $22.9{\;}\times{\;}19.8{\;}\mu\textrm{m}$ (R = 1.16). The size of the contracted sporonts was $17.4{\;}\times{\;}16.3{\;}\mu\textrm{m}$ (R = 1.061). By 96 hours, sporulation is complete and the ratio of length/width was constant relatively. And the sizes of oocysts and sporocysts were $22.8{\;}\times{\;}20.5{\;}\mu\textrm{m}$ (R = 1.11) and $15.0{\;}\times{\;}10.8{\;}\mu\textrm{m}$ (R = 1.39), respectively. At this time it is most reliable for the measurements of oocyst sizes of 1. ohioensis to provide with the identifiable clues against the others. It is therefore recommended that the clinical fecal specimens suspected of isosporosis should first be incubated and aerated for 96 hours before a definitive parasitological diagnosis can be reached. These and other observations contribute to the understanding of the biological characteristics and laboratory and clinical diagnosis of isosporosis.
한국산 개로부터 Isospornohioenis를 분리하기 위하여 형태학적 특성을 관찰하였던 바 다음과 같은 결과를 얻었다. 즉, 전북지방의 개의 분편에서 검출된 Isospora spp. 중 I. ohioensis의 oocyst 하나를 분리하여 강아지에 경구감염시켜 얻은 oocyst를 다시 5두의 개에 감염시킨 후 형태학적 특성을 현미경하에서 관제하였다. 이의 잠복기는 4일이었으며 분편내에 배출된 oocyst의 크기는 $22.9{\;}{\times}{\;}19.8{\;}\mu\textrm{m}$ (R = 1.16)이었고 sporont의 크기는 $17 4{\;}{\times}{\;}16.3{\;}\mu\textrm{m}$ (R = 1.06)이었다. 96시간에 있어서 포자가 완전히 형성되었으며 oocyst 및 sporocyst의 크기는 각각 $22.8{\;}{\times}{\;}20.5{\;}\mu\textrm{m}$ (R = 1.11)과 $15.0{\;}{\times}{\;}10.8{\;}\mu\textrm{m}$ (R = 1.39)이었다. 포자형성 후에 oocyst 및 sporocyst의 크기는 거의 변화가 없었던 점으로 보아 개의 분편검사를 통한 Isosporc속의 감별진단을 위하여 96시간 정도의 포자형성기문이 필요할 것으로 예상되는 바이다.
