Surface ultrastructure of larval Anisakidae (Nematoda: Ascaridoidea) and its identification by mensuration.

The surface ultrastructure of larval Anisakis type I, Anisakis type II, Raphidascaris, Contracaecum type A, Thynnascaris type A and Thynnascaris type B was examined by scanning electron microscopy. These species were identified clearly by the presence of a boring tooth, a mucron, and other morphological features. The means of the distances between transverse striations (DBTS) of larval Anisakis type I (5.45 +/- 0.125 micron), larval Raphidascaris (2.92 +/- 0.051 micron), and larval Contracaecum type A (1.68 +/- 0.056 micron) are significantly different (p less than 0.05). There was a correlation between the diameter of worm trunk (DOWT) and DBTS among these three larval types. In most cases a larva could be identified from the mean value of DBTS and DOWT even if obtained as a fragment from a patient.</p

The present status of parasitic infections in Manabe island, Okayama prefecture

A fecal examination for each of 471 residents of Manabe island was performed to clarify the status of parasitic infection by direct smear in August, 1977. The results were as follows: 1. Helminths found included Ascaris lumbricoides (2 cases, 0.4%), Trichuris trichiura (18 cases, 3.8%), Ancylostoma duodenale (5 cases, 1.1%) and Heterophyes heterophyes (4 cases, 0.9%). 2. The average infection rate was 6.2% for the whole area

A intestinal anisakiasis with a ileus.

A case of ileus caused by intestinal anisakiasis is described in this paper. The intestine manifested a typical allergic inflamation. Pathological changes such as extensive edema 2nd fibrosis were found in the intestine. Eosinophiles, neutrophiles and monocytes also infiltrated near the site of the penetrating worm. The worm from the intestine of the patient was identified with a SEM. On the basis of the available evidence, it can be safely said that this worm is Anisakis type I larva, although the mucro on the tip of larval tail was not clear. The patient may have been infected with Anisakis larva by eating "SASHIMI" of a small yellowtail (HAMACHI) from the Seto Inland Sea, because these small yellowtail were fed fish caught near Hokkaido, Tohoku and San-in

Imported malaria in Okayama prefecture

Two cases of imported malaria which occurred in Okayama prefecture are reported. One was infected with Plasmodium vivax in India, the other with P. falciparum at Nigeria, Africa. The efficacy of some antimalarial drugs in these cases is discussed. One patient was infected with P. falciparum, despite taking the medicine Daraprim® regularly. The efficacy of Daraprim® for suppressive cure in Nigeria is doutful. The therapy of chloroquine-resistance tropical malaria is also discussed

A case report of malaria in a foreign sailor in Japan

A foreign soilor who had arrived by ship from Goa, India, was found to be infected with both Plasmodium falciparum and P. vivax. Although the P. vivax was a chloroquine-resistant type, Fansidal Ⓡ was effective and the patient recovered. As it was the season for proliferation of mosquitoes in Japan, the patient was isolated so as not to become a source of secondary infection. Knowing the place where a patient with high grade fever comes from is of great help in diagnosing malaria, which is seldom seen in Japan

Imported malaria in Okayama prefecture

Two cases of imported malaria which occurred in Okayama prefecture are reported. One was infected with Plasmodium vivax in India, the other with P. falciparum at Nigeria, Africa. The efficacy of some antimalarial drugs in these cases is discussed. One patient was infected with P. falciparum, despite taking the medicine Daraprim® regularly. The efficacy of Daraprim® for suppressive cure in Nigeria is doutful. The therapy of chloroquine-resistance tropical malaria is also discussed

The Seasonal Distribution of Mosquitoes and the Incidence of Japanese B Encephalitis in Okayama Prefecture during 1979

県下9ヶ所の定点において，light-trapによる蚊の終夜採集を，4月より9月迄行った。1. 本年の平均気温が平年より上回ったのは6月に入ってからで，4月の降雨量は，平年より少なく，県南では，平年の50％以下であった。6月6日梅雨入りし，7月25日に明けた。8月に台風11号，9月に台風12号，16号が岡山附近を通った。本年の平均気温が，本格的に25℃を越えたのは，7月19日～8月28日の40日間で，昨年より20日間も短くなっている。2. アカイエカの採集総数が，昨年より増えたのは，岡山（保）で1.5倍，瀬戸で1.3倍，成羽で1.6倍，津山で3.4倍であった。一方倉敷，新見では，1/2に減少している。3. コガタイエカの採集総数が，昨年より増えたのは，笠岡で3.5倍，瀬戸で2.9倍，成羽で1.3倍，新見で5倍であった。一方減ったのは，倉敷で1/1.1，岡山（保）で1/1.6に減少している。4. シナハマダラカの採集総数が昨年より減ったのは，倉敷で1/2，瀬戸で1/1.5に，減少した。また岡山（保）では，雌3羽，雄3羽と少なく，西大寺保健所では，雌1羽だけで，岡大・医学部構内では，全然採集されなかった。5. 本年は新たに，岡山市西大寺保健所が定点に加えられ，一方岡大・医学部構内でも採集を行ったが，高い塀で囲まれている関係で，採集数も少なかった。6. 本年の採集蚊数で，アカイエカ，コガタイエカ，シナハマダラカ共に，昨年より増えたのは，笠岡，成羽，津山で共に昨年より減ったのは，倉敷のみであった。瀬戸では，アカイエカ，コガタイエカの増加がみられた。7. 本年は，日本脳炎患者の発生は，疑似患者のみで真性患者の発生は見られなかった。Mosquito collections were done at nine spots in Okayama Prefecture twice a week from April till September in 1979. The day-light type light-trap was used for the mosquito collection and the trap was set all night long. 1. The mean temperature of the day became higher than the average one after June and was higher than 25℃ for 40 days from July 19 till August 28. The term was 20 days shorter than that of last year. The rainly season lasted from June 6 till July 25. Typhoon No. 11 passed bv Okayama Prefecture in August and No.12 & No. 16 in September. 2. The numbers of collected Culex pipiens pallens were more than those of last year at Okayama (1.5 times). Seto (1.3 times). Nariwa (1.6 times) and Tsuyama (3.4 times) respectively. While the numbers decreased at Kurashiki and Niimi (1/2 time). 3. The numbers of collected Culex tritaeniorhynchus increased comparing to those of last year at Kasaoka (3.5 times). Seto (2.9 times), Nariwa (1.3 times) and Niimi (5 times). While they decreased at Kurashiki (1/1.1 time) and Okayama (1/1.6 time). 4. In Anopheles sinensis the collected numbers decreased comparing to those of last year at Kurashiki (1/2 time) and Seto (1/1.5 time). Only three femal and three male mosquitoes were caught at Okayama, one female at Saidaiji, and no Anopheles sinensis was caught at the compus of Okayama University Medical School. 5. The numbers of collected mosquitoes were very few at Saidaiji (where mosquito collection was started newly from 1979) and Okayama University Medical School. 6. The collected numbers in all Culex pipiens pallens. Culex tritaeniorhynchus and Anopheles sinensis increased at Kasaoka, Nariwa and Tsuyama. While the numbers in all these three species decreased at Kurashiki. At Seto the numbers of collected mosquitoes increased only in Culex pipiens pallens and Culex tritaeniorhynchus. 7. There was no human case of Japanese B encephalitis in 1979