| co-circulation of two genetically distinct viruses in an outbreak of african swine fever in mozambique: no evidence for individual co-infection. | in 1998, domestic pigs originating from villages within a 40 km radius of ulongwe in the northern tete province of mozambique were held in a quarantine facility for a 3-month period prior to their importation into south africa. eight of a total of 25 pigs died within the first 3 weeks of quarantine of what appeared clinically and on post mortem examination to be african swine fever (asf). organs were collected and preserved in formol-glycerosaline and the presence of asf virus in these specimens ... | 2004 | 15504588 |