Comparative studies on susceptibilities of two different Japanese isolates of Oncomelania nosophora to three strains of Schistosoma japonicum originating from Japan, China, and the Philippines

Kirinoki, Masashi; Hu, M.; Yokoi, Hajime; Kawai, Shinya; Terrado, R.; Ilagan, Eunice J.; Chigusa, Yuichi; Sasaki, Yosuke; Matsuda, Hajime

doi:10.1017/s0031182004006924

Cited by 8 publications

(8 citation statements)

References 12 publications

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“…Studies investigating the susceptibility of snails from different geographic locations to cercariae from disparate locations have produced mixed results, indicating a certain amount of genetic drift of the parasite [111,112]. Although Japan has successfully eliminated schistosomiasis, the requisite intermediate host snail species, Oncomelania hupensis nosphora and O. hupensis formosana , are still present [113].…”

Section: Epidemiologymentioning

confidence: 99%

“…This method was used with great success in Japan in combination with mollusciciding. In Japan, the most common method of environmental modification was the use of concreting canals where the snails lived [113]. This method is more difficult to implement in areas where the snail habitats are rice fields or marshland.…”

Section: Epidemiologymentioning

confidence: 99%

“…There were a number of endemic areas in Japan pre-elimination, including Kofu basin, Fukuoka, and Saga prefectures, which appeared to have had the highest prevalence [173]. Due to a successful control program, transmission of the parasite no longer occurs there, although the requisite intermediate host snail species, Oncomelania nosphora , is still present [113]. In addition to the control initiatives implemented, modernization and socioeconomic development had a large impact on elimination of this parasite in Japan.…”

Section: Current and Historical Status Of Schistosomiasis In Asiamentioning

confidence: 99%

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Asian Schistosomiasis: Current Status and Prospects for Control Leading to Elimination

et al. 2019

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Schistosomiasis is an infectious disease caused by helminth parasites of the genus Schistosoma. Worldwide, an estimated 250 million people are infected with these parasites with the majority of cases occurring in sub-Saharan Africa. Within Asia, three species of Schistosoma cause disease. Schistosoma japonicum is the most prevalent, followed by S. mekongi and S. malayensis. All three species are zoonotic, which causes concern for their control, as successful elimination not only requires management of the human definitive host, but also the animal reservoir hosts. With regard to Asian schistosomiasis, most of the published research has focused on S. japonicum with comparatively little attention paid to S. mekongi and even less focus on S. malayensis. In this review, we examine the three Asian schistosomes and their current status in their endemic countries: Cambodia, Lao People’s Democratic Republic, Myanmar, and Thailand (S. mekongi); Malaysia (S. malayensis); and Indonesia, People’s Republic of China, and the Philippines (S. japonicum). Prospects for control that could potentially lead to elimination are highlighted as these can inform researchers and disease control managers in other schistosomiasis-endemic areas, particularly in Africa and the Americas.

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Section: Epidemiologymentioning

confidence: 99%

Section: Epidemiologymentioning

confidence: 99%

Section: Current and Historical Status Of Schistosomiasis In Asiamentioning

confidence: 99%

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Asian Schistosomiasis: Current Status and Prospects for Control Leading to Elimination

et al. 2019

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“…Gastropoda Oncomelania hupensis nosophora Robson, 1915Trematoda Schistosoma japonicum Katsurada, 1904Sj 8 mm Sj 1970Nihei et al, 1981Sj 201220121977Sj Sj 19762003Hunter and Yokogawa, 1984Sj 10 19901980Sj Sj 10 Sj 1985Kojima et al, 1985 Sj 2 32 Kojima et al, 1988 15,000 Sj 1985 15 45 Sj Kojima et al, 19881985Sj 19861980201535 Sj 19861996Kojima et al, 1985Kojima et al, 1988Tanaka and Tsuji, 1997Sj 2001; Sasaki et al, 2005 88 km 273.2 km 2 2 Kojima et al, 1985Kojima et al, , 198819801989 1 4 2 4 50 100 mL 200 100 1986 7 3 1995 2015 1 4 1 4 2001; Kirinoki et al, 2005Kirinoki et al, 2002Kirinoki et al, 2005Kirinoki et al, , 2012Nihei et al, 2003Nihei et al, , 2006…”

mentioning

confidence: 99%

千葉県小櫃川流域における日本住血吸虫中間宿主ミヤイリガイの生息地の変遷

Nihei

Kirinoki

Koen³

et al. 2018

Jap. J. Sanit. Zool.

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Oncomelania hupensis nosophora (Ohn) is the intermediate snail host of Schistosoma japonicum (Trematoda; Schistosomatidae) (Sj) in Japan. The last domestic schistosomiasis infection in Japan has been thought to occur in Yamanashi Prefecture in 1977. In 1985, the intermediate host snail was isolated from paddy fields along the Obitsu River basin in Chiba Prefecture, Japan. At that time, schistosomiasis was assumed to become a past disease in this area. Thus, activities to exterminate Ohn or annual screening programs of residents in this area had not been conducted. Indeed, this disease represents a neglected endemic disease in Japan. This report describes the epidemiological history of the disease from various approaches including clinical information, philological study, interview surveys, snail collection surveys, and changes in land use and environments using geographic information systems. The assumption of disease elimination was based on the lack of reports of new infection for more than 30 years, environmental modifications, and almost no snail infestation from 2012 onward in known habitats. We concluded that continuous monitoring of the snails is not necessary in the studied area, while a certain level of attention to redistribution of the snail from hidden habitats may be required.

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“…Although all the specimens of this species that were recently collected from the Kofu basin were found to be uninfected, they were susceptible to experimental infection with the Philippine strain of S. japonicum (Kirinoki et al, 2005). As there is some evidence to indicate that, in some parts of Japan, the habitats in which O. nosophora does or could breed are expanding and the densities of O. nosophora are increasing, the possibility that schistosomiasis japonica may re-emerge in Japan appears to be increasing (Nihei et al, 2003(Nihei et al, , 2004).…”

mentioning

confidence: 99%

Establishment of a GIS monitoring system for schistosomiasis japonica in Kofu, Japan

Nihei

Kajihara²,

Kirinoki³

et al. 2006

Annals of Tropical Medicine & Parasitology

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Although the incidence of human infection with Schistosoma japonicum in Japan fell to zero in 1977, the threat of the possible re-emergence of the disease caused by this trematode still exists. Surveillance of the parasite's intermediate host, Oncomelania nosophora, in Kofu basin therefore began in 1996. A simple, new method for monitoring O. nosophora in an at-risk area in Kofu, which is based on a geographical information system (GIS), was established. At each monitoring site (of which there were 120 from 1996 until 2000, and 60 from 2001 until 2003), the O. nosophora in two quadrats, each measuring 25 x 25 cm, were collected. During the study, the exact location of each site was determined using a hand-held global-positioning system (GPS). This allowed all the sites to be digitally mapped, so that anyone with a hand-held GPS could and can reach each site. The snail and location data were processed using commercial GPS/GIS software packages and used to create a risk map for schistosomiasis re-emergence. Although all snails collected between 1996 and 2003 were uninfected, the proportion of investigated sites in which O. nosophora was detected increased from 36.7% in 1996 to 56.7% in 2003. The mean number of O. nosophora collected per snail-positive site fluctuated widely, between 8.2 and 57.4, in each calendar year. Over the study period there appeared to be a shift southwards in the areas with high densities of O. nosophora. The present results indicate that it is possible to utilize a GIS-based method for the long-term monitoring of the possible re-emergence of schistosomiasis japonica in Japan.

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Comparative studies on susceptibilities of two different Japanese isolates of Oncomelania nosophora to three strains of Schistosoma japonicum originating from Japan, China, and the Philippines

Cited by 8 publications

References 12 publications

Asian Schistosomiasis: Current Status and Prospects for Control Leading to Elimination

Asian Schistosomiasis: Current Status and Prospects for Control Leading to Elimination

千葉県小櫃川流域における日本住血吸虫中間宿主ミヤイリガイの生息地の変遷

Establishment of a GIS monitoring system for schistosomiasis japonica in Kofu, Japan

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