Relative resistance to chlorine of poliovirus and coxsackievirus isolates from environmental sources and drinking water.
AUTOR(ES)
Payment, P
RESUMO
Several poliovirus and coxsackievirus isolates from environmental sources were compared with laboratory strains to determine their rate of inactivation by chlorine. All viruses were tested for up to 1,000 min in the presence of an initial free residual chlorine level of ca. 0.4 mg/liter. Coxsackievirus B5 (CB-5) isolates were found to be more resistant to chlorine than coxsackievirus B4 (CB-4), followed by poliovirus 1, 2, and 3 in order of decreasing resistance to chlorine. Environmental isolates of CB-5 were more resistant than the laboratory strain tested, and for two strains 12 and 22% of the input virus was still infectious after 100 min in the presence of free residual chlorine. Although CB-4 isolates were less resistant to chlorine than CB-5 isolates, after 1,000 min of contact 0.01% of the input virus was still infectious. Except for CB-5 isolates, isolates from environmental sources did not appear to be more resistant to chlorine than laboratory strains. Viruses isolated at different phases during the preparation of drinking water were not more resistant to chlorine and must thus have been protected by other mechanisms.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=238481Documentos Relacionados
- Chlorine resistance of poliovirus isolants recovered from drinking water.
- Relative Chlorine Resistance of Poliovirus I and Coliphages f2 and T2 in Water
- Round robin investigation of methods for the recovery of poliovirus from drinking water.
- Chlorine resistance patterns of bacteria from two drinking water distribution systems.
- Inactivation of poliovirus I (Brunhilde) single particles by chlorine in water.
