taxonomy and transmission dynamics of - university of hawaii maldonado angio workshop.pdf ·...
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Arnaldo Maldonado Júnior
Laboratório de Biologia e Parasitologia de Mamíferos Silvestres Reservatórios Instituto Oswaldo Cruz/ FIOCRUZ
Taxonomy and transmission dynamics of Angiostrongylus cantonensis in Rattus norvegicus
in Brazil
LBPMR
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SEARCH FOR ANGIOSTRONGYLUS CANTONENSIS IN RODENTS
TWO REGIONS WERE INVESTIGATED: • NORTHEAST • SOUTHEAST
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SEARCH FOR ANGIOSTRONGYLUS CANTONENSIS IN RODENTS
Field laboratory under biosecurity rules
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São Gonçalo municipality, Rio de Janeiro
THE STUDY AREA IN SOUTHEAST BRAZIL
Poor area associated with rodent proliferation
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Rattus norvegicus
Achatina fulica
27 rodents captured: 74% infected 265 lung worms collected
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Angiostrongylus cantonensis in Rattus norvegicus brain
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Rat lungs naturally infected with A. cantonensis
Rat lungs with A. cantonensis
Angiostrongylus cantonensis
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T
1
2
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A. cantonensis prevalence in R. norvegicus from São Gonçalo (2009 - 2010)
A. cantonensis mean intensity in R. norvegicus (2009 - 2010)
0102030405060708090
100
março 2010 junho 2010 setembro 2010 dezembro 2010 março 2011March June September December March
0
5
10
15
20
25
março 2010 junho 2010 setembro 2010 dezembro 2010 março 2011March June September December March
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CONCLUSION
• A.cantonensis lung worm infection is enzootic among the exotic Norway rat population in the study region
• The high natural infection rate (74%) together with the dense
population of A. fulica in the area emphasize the risk of disease transmission to humans
• Local residents should be informed about disease transmission
and prevention, and physicians should consider A.cantonensis EM in their differential diagnosis when appropriate
• Surveillance and control strategies to reduce mollusc and rodent
populations should be implemented in the study area
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Thanks! Thanks!