2/6/19, remise des conditions de paix aux Autrichiens [préliminaires au traité de Saint-Germain-en-Laye du 10 septembre, au château] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 54221

Interruption of vector transmission by native vectors and “the art of the possible”

In a recent article in the Reader’s Opinion, advantages and disadvantages of the certification processes of interrupted Chagas disease transmission (American trypanosomiasis) by native vector were discussed. Such concept, accepted by those authors for the case of endemic situations with introduced vectors, has been built on a long and laborious process by endemic countries and Subregional Initiatives for Prevention, Control and Treatment of Chagas, with Technical Secretariat of the Pan American Health Organization/World Health Organization, to create a horizon target and goal to concentrate priorities and resource allocation and actions. With varying degrees of sucess, which are not replaceable for a certificate of good practice, has allowed during 23 years to safeguard the effective control of transmission of Trypanosoma cruzi not to hundreds of thousands, but millions of people at risk conditions, truly “the art of the possible.”

Virulence variation among epidemic and non-epidemic strains of Saint Louis encephalitis virus circulating in Argentina

Saint Louis encephalitis virus caused an outbreak of febrile illness and encephalitis cases in Córdoba, Argentina, in 2005. During this outbreak, the strain CbaAr-4005 was isolated from Culex quinquefasciatus mosquitoes. We hypothesised that this epidemic variant would be more virulent in a mouse model than two other non-epidemic strains (78V-6507 and CorAn-9275) isolated under different epidemiological conditions. To test this hypothesis, we performed a biological characterisation in a murine model, including mortality, morbidity and infection percentages and lethal infection indices using the three strains. Mice were separated into age groups (7, 10 and 21-day-old mice) and analysed after infection. The strain CbaAr-4005 was the most infective and lethal of the three variants, whereas the other two strains exhibited a decreasing mortality percentage with increasing animal age. The strain CbaAr-4005 produced the highest morbidity percentages and no significant differences among age groups were observed. The epidemic strain caused signs of illness in all inoculated animals and showed narrower ranges from the onset of symptoms than the other strains. CbaAr-4005 was the most virulent for Swiss albino mice. Our results highlight the importance of performing biological characterisations of arbovirus strains likely to be responsible for emerging or reemerging human diseases.

Équipe d'Italie [épreuves d'aviron dans le bassin de Saint-Cloud-Suresnes] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 55039

Passage course du huit [épreuves d'aviron dans le bassin de Saint-Cloud-Suresnes] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 55038

Équipe d'Australie [épreuves d'aviron dans le bassin de Saint-Cloud-Suresnes] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 55037

Équipe de Cambridge [épreuves d'aviron dans le bassin de Saint-Cloud-Suresnes] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 55036

Équipe d'Australie [épreuves d'aviron dans le bassin de Saint-Cloud-Suresnes] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 55040