The Kofu Basin in Yamanashi Prefecture, Central Japan, was one of the major areas where the incidence of a parasitic disease known as schistosomiasis japonica was particularly high in this country. Even today, the eggs of the parasite,
Schistoma japonicum, are often detected by histopatholpgical examination. Photographic examination also reveals liver complications associated with blood fluke infection.
The present paper reports the detection ratios of
S. japonicum eggs and schistosome-causing liver disease registered in our laboratory.
(1) The tetection ratio in nectrops was 43.0%.
(2) The egg examination of surgically resected specimens resulted in the egg detection ratio of 25.0 for the liver, 6.3% for the stomach, 6.8% for the duodenum, 27.7% for the large intestine, 8.6 for the appendix, 1.4% for the gallbladder and 10.7% for the-lymph node.
(3) Biopsy specimens: 12.6% for the liver, 0.4% for the stomach; 3.0% for the duodenum; 5.9% for the large intestine; and 4.8% for the lung.
(4) Age-wise ratios by histopathological examinat on: 1.2% in 40-49; 2.2% in 50-59; 3.5% in 60-69; 8.2% in 70-79; 10.1 in 80-89.
(5) The diagnositc ratio of schistosome-associated liver disease by ultrasonics wave test was 62.1% while the detection ratio of the same disease by
supersonic wave examination was 3.5%.
(6) The diagnostic ratio of the schistosome-asscciated liver disease by CT was 42.1%.
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