Hepatotropic viruses in the Brazilian Amazon: a health threat

by Raymundo Paraná, Ludmila Vitvitski, Joao Eduardo Pereira

Serological markers of hepatitis A, B and C viruses in rural communities of the semiarid Brazilian Northeast

by Delvone Almeida, José Tavares-Neto, Ludmila Vitvitski, Alessandro Almeida, Caroline Mello, Diana Santana, Fernando Tatsch, Raymundo Paraná