Previous Article | Next Article ![]()
Appl. Environ. Microbiol., 04 1995, 1520-1526, Vol 61, No. 4
MA Woody and DO Cliver
Human enteric viruses have been found in groundwater in the absence of
fecal coliforms. Because detection of human enteric viruses is costly,
time-consuming, and lacking in sensitivity, F-specific RNA (FRNA)
coliphages, which infect Escherichia coli by attachment to F pili, are
being examined for suitability as indicators of human enteric viruses in
groundwater. Temperatures and host cell growth conditions that constrain
F-pilus expression will limit FRNA coliphage replication in groundwater and
wastewater, as is desirable in an indicator. Below 25 degrees C F-pilus
synthesis ceases; FRNA coliphage Qbeta did not replicate below this
temperature in batch cultures. One-step replication studies indicated that
the replicative cycle is prolonged and that fewer progeny are released as
the temperature decreases. The decreases in phage replication observed in
the one-step replication studies were a consequence of fewer cells infected
as the temperature was lowered or as host cells entered stationary phase.
The numbers of phage particles released from infected cells did not change.
The minimum temperature for replication of Qbeta, 25 degrees C, is not
maintained in wastewater and does not occur in Wisconsin groundwater. On
the basis of temperature and host cell growth phase, we have concluded that
extensive replication of FRNA coliphages does not occur in wastewater and
groundwater in Wisconsin and areas with similar cool climates.
Copyright © 1995, American Society for Microbiology
Effects of temperature and host cell growth phase on replication of F- specific RNA coliphage Q beta
Department of Bacteriology, Food Research Institute, World Health Organization Collaborating Centre on Food Virology, Madison, Wisconsin 53706-1187, USA.
This article has been cited by other articles:
Copyright © 2009 by the American Society for Microbiology. For an alternate route to Journals.ASM.org, visit: http://intl-journals.asm.org | More Info»