O autor estudou a susceptibilidade à Pasteurella pestis de um roedor silvestre encontrado no Brasil, Sciurus alphonsei (sciuridae). Foram utilizadas duas cêpas de P. pestis procedentes de roedores silvestres: uma, P. EXU 19, isolada de O. subflavus no município de Exu, Pernambuco (Brasil) e a outra, RANGEL, isolada de S. hispidus de Camp. Rangel (Venezuela). Foram testados seis animais inoculados por diferentes vias (percutânea, subcutânea e peritoneal). Todos os animais morreram com resultados positivos à infecção.

The author studied the susceptibility of the wild rodent, Sciurus alphonsei (Sciuridae) from Brazil to Pasteurella pestis. Two strains of P. pestis isolated from wild rodents were used: one, P. EXU 19, was isolated from O. subflavus in the county of Em, Pernambuco (Brazil), and other, RANGEL, isolated from S. hispidus of Camp. Rangel (Venezuela) . Six animais were tested by inoculation through different routes (percutaneous, subcutaneous and peritoneal). All the animals died as a result of the infection.

Studies on susceptibility of domestic rodents (R. r. frugivurus and R. norvegicus) from Recife, Brazil, to two strains of Pasteurella pestis were made. The strains of P. pestis used in the experiments were isolated from wild rodents, one (PEXU 19) in Exu, State of Pernambuco an another (RANGEL) in Venezuela. "Swiss" mice were used for comparative purposes. Domestic rats showed to be moderatly resistant to both P. pestis strains, while the swiss mice were considered highly susceptible to them

L'auíeur a vérifié la susceptibilité de deux espèces de rongeurs domestiques de la ville de Recife. Etat du Pernambuco, R. norvegicus et Rattus rattus frugivurus, les comparant aux souris albinos de la souche "Swiss" avec deux souches de P. pestis dont une était isolée au municipe d'Exu, Etat du Pernambuco âenommée PEXU 19 et Vautre provenante du Venezuela dite RANGEL. Les deux espèces de rongeurs ont montré une resistence modérée par rapport aux deux souches de P. pestis tandis que les souris ont révélé d'être hautement susceptibles.