The Habitat of the Snail Host of Schistosoma japonicum in the Philippines

Science ◽  
1946 ◽  
Vol 104 (2688) ◽  
pp. 5-5
Author(s):  
John Lawrence Avery
Keyword(s):  
Schistosoma Japonicum ◽  
The Philippines ◽  
Snail Host

scholarly journals Genetic Structure Inferred from Mitochondrial 12S Ribosomal RNA Sequence of Oncomelania quadrasi, the Intermediate Snail Host of Schistosoma japonicum in the Philippines

2014 ◽  
Vol 90 (6) ◽  
pp. 1140-1145 ◽  
Author(s):  
Weerachai Saijuntha ◽  
Ross H. Andrews ◽  
Mihoko Kikuchi ◽  
Louie S. Sunico ◽  
Masashi Kirinoki ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Schistosoma Japonicum ◽  
Ribosomal Rna ◽  
The Philippines ◽  
Snail Host ◽  
Intermediate Snail Host ◽  
Rna Sequence

scholarly journals Population Genetics of Schistosoma japonicum within the Philippines Suggest High Levels of Transmission between Humans and Dogs

2008 ◽  
Vol 2 (11) ◽  
pp. e340 ◽  
Author(s):  
James W. Rudge ◽  
Hélène Carabin ◽  
Ernesto Balolong ◽  
Veronica Tallo ◽  
Jaya Shrivastava ◽  
...  
Keyword(s):  
Population Genetics ◽  
Schistosoma Japonicum ◽  
The Philippines

scholarly journals Timing and causes of the distribution pattern of Oncomelania hupensis estimated by molecular and geologic data

2018 ◽  
Author(s):  
Wen-bin Ji ◽  
Shu-xin Xu ◽  
Jun Bai ◽  
Ying-yi Cui ◽  
Xian-min Zhou ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Schistosoma Japonicum ◽  
Yangtze River ◽  
Molecular Data ◽  
The Philippines ◽  
Tibet Plateau ◽  
Snail Species ◽  
The Yangtze River ◽  
Oncomelania Hupensis ◽  
Distribution Ranges

Abstract:As the only intermediate host of Schistosoma japonicum, Oncomelania hupensis plays an irreplaceable role in the prevalence of schistosomiasis japonica. Several living subspecies of Oncomelania hupensis are found in Asia, especially in China, Japan,the Philippines, and Sulawesi of Indonesia. The existing geographical distribution pattern of O. hupensis has been influenced by geological events. This study used existing mitochondrial gene data for O. hupensis in the GenBank database and the molecular clock method to estimate the divergence time of each subspecies of O. hupensis. For the first time, the timing and causes of the distribution pattern of the different O. hupensis subspecies were studied by combining molecular data with data on geologic events. The results showed that the uplift and isolation of the Qinghai-Tibet Plateau caused Oncomelania hupensis robertsoni to differentiate 4.76 Ma(Million anniversary), while Oncomelania hupensis guangxiensis was affected by the third Himalayan orogenic movement, differentiating 1.10 Ma. Oncomelania hupensis nosophora was influenced by the formation of the Yonaguni Strait and diverged 1.43 Ma. Influenced by ice ages and interglacial periods, Oncomelania hupensis tangi and Oncomelania hupensis formosana diverged 0.57 Ma. The link of the ancient Yangtze River promoted the spread of O. hupensis to the middle and lower reaches of the Yangtze River, and the developed water network facilitated gene exchange among Oncomelania hupensis hupensis in the area. Eventually, 0.62 Ma, O. h. hupensis differentiated.Author summaryPhylogenetic analysis of Pomatiopsidae species showed that Oncomelania was isolated from other genera and clustered independently in phylogenetic trees. Further analysis of the species Oncomelania hupensis and its subspecies was performed. The snail species O. hupensis has multiple subspecies that exhibit certain differences. These subspecies are distributed across Asia, from China’s Yunnan Province in the west to Japan in the east and south to the Philippines and Indonesia. In addition, the subspecies are widespread in the middle and lower reaches of the Yangtze River in China, and the distribution ranges of the different subspecies do not overlap. The formation of this distribution pattern of each subspecies of O. hupensis has a profound impact on the prevalence of Schistosoma japonicum. Therefore, the authors analyzed molecular data and geological historical events to investigate the timing and causes of the distribution pattern of each subspecies of O. hupensis.

scholarly journals Geographic strain differentiation of Schistosoma japonicum in the Philippines using microsatellite markers

2017 ◽  
Vol 11 (7) ◽  
pp. e0005749 ◽  
Author(s):  
Kharleezelle J. Moendeg ◽  
Jose Ma M. Angeles ◽  
Ryo Nakao ◽  
Lydia R. Leonardo ◽  
Ian Kendrich C. Fontanilla ◽  
...  
Keyword(s):  
Microsatellite Markers ◽  
Schistosoma Japonicum ◽  
The Philippines ◽  
Strain Differentiation

ANTIGEN-SPECIFIC ANTIBODY ISOTYPE PATTERNS TO SCHISTOSOMA JAPONICUM RECOMBINANT AND NATIVE ANTIGENS IN A DEFINED POPULATION IN LEYTE, THE PHILIPPINES

2004 ◽  
Vol 70 (5) ◽  
pp. 549-555 ◽  
Author(s):  
LUZ P. ACOSTA ◽  
WILFRED U. TIU ◽  
DONALD P. MCMANUS ◽  
REMIGIO M. OLVEDA ◽  
GEMILIANO DL. ALIGUI
Keyword(s):  
Schistosoma Japonicum ◽  
Specific Antibody ◽  
The Philippines ◽  
Antibody Isotype

SCHISTOSOMA JAPONICUM AND OCCULT BLOOD LOSS IN ENDEMIC VILLAGES IN LEYTE, THE PHILIPPINES

2005 ◽  
Vol 72 (2) ◽  
pp. 115-118 ◽  
Author(s):  
HEMAL K. KANZARIA ◽  
DARIA L. MANALO ◽  
JONATHAN D. KURTIS ◽  
LUZ P. ACOSTA ◽  
JENNIFER F. FRIEDMAN ◽  
...  
Keyword(s):  
Blood Loss ◽  
Schistosoma Japonicum ◽  
Occult Blood ◽  
The Philippines

scholarly journals Geographical distribution of human Schistosoma japonicum infection in The Philippines: tools to support disease control and further elimination

2014 ◽  
Vol 44 (13) ◽  
pp. 977-984 ◽  
Author(s):  
Ricardo J. Soares Magalhães ◽  
Maria Sonia Salamat ◽  
Lydia Leonardo ◽  
Darren J. Gray ◽  
Hélène Carabin ◽  
...  
Keyword(s):  
Disease Control ◽  
Schistosoma Japonicum ◽  
Geographical Distribution ◽  
The Philippines

scholarly journals Prevalence of Schistosoma japonicum infection of Oncomelania quadrasi snail colonies in 50 irrigated and rain-fed villages of Samar Province, the Philippines

Acta Tropica ◽  
2008 ◽  
Vol 105 (3) ◽  
pp. 235-241 ◽  
Author(s):  
Henry Madsen ◽  
Hélène Carabin ◽  
Don Balolong ◽  
Veronica L. Tallo ◽  
Remigio Olveda ◽  
...  
Keyword(s):  
Schistosoma Japonicum ◽  
The Philippines
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