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New evidence that Callithrix spp. is assuming an important role in the epidemiology of yellow fever virus

Siconelli, M. J. L.; Dias, J. C. d. A.; Machado, E. F.; Cunha, M. S.; Fernandes, N. C. C. d. A.; Guerra, J. M.; Bonon, L.; Salomao, A. B.; Werther, K.; Burger, K. P.; Carvalho, A. A. B.; Marques, D.; Fonseca, B. A. L. d.

2025-09-08 public and global health
10.1101/2025.09.07.25335112 medRxiv
Show abstract

In 2023, a new yellow fever virus (YFV) lineage was introduced in Sao Paulo State, Brazil. From July 2024 to June 2025, nine Callithrix penicillata tested positive, showing low YFV viral load but characteristic organ lesions, suggesting this genus may replace Alouatta sp. as sentinel to detect YFV circulation.

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