High Levels of Schistosoma japonicum Transmission between Humans and Dogs in the Philippines
Author Information
Author(s): Rudge James W., Carabin Hélène, Balolong Ernesto Jr, Tallo Veronica, Shrivastava Jaya, Lu Da-Bing, Basáñez María-Gloria, Olveda Remigio, McGarvey Stephen T., Webster Joanne P.
Primary Institution: Department of Infectious Disease Epidemiology, Faculty of Medicine, Imperial College London
Hypothesis
What are the transmission patterns of Schistosoma japonicum across different host species in the Philippines?
Conclusion
The study suggests that there are very high levels of transmission of Schistosoma japonicum between dogs and humans in the Philippines.
Supporting Evidence
- High prevalence of S. japonicum infection was found in dogs, with some villages reporting up to 86.3% infection rates.
- Genetic analysis showed no significant differentiation between S. japonicum samples from humans and dogs.
- Transmission dynamics suggest that dogs are a significant reservoir for human infections.
Takeaway
This study found that the parasite causing schistosomiasis can easily move between dogs and humans, which means controlling the disease might need to include treating dogs too.
Methodology
The study collected and genotyped S. japonicum samples from humans, dogs, pigs, and rats across two geographic areas in Samar Province, using microsatellite markers.
Potential Biases
Potential bias due to the sampling method and the limited geographic areas studied.
Limitations
The study had limited sample sizes for some host species, particularly rats and pigs, which may affect the generalizability of the findings.
Participant Demographics
Samples were collected from humans and various animal species (dogs, pigs, rats) in Samar Province, Philippines.
Statistical Information
P-Value
0.004
Confidence Interval
95% CI from bootstrapping: −0.002 to 0.014
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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