Abstract
pHCM2 is a 106kbp cryptic plasmid harboured by Salmonella typhi CT18, originally isolated from a typhoid patient in Vietnam. The genome of S. typhi CT18, including pHCM2, has recently been completely sequenced and annotated. Bioinformatic analysis revealed that 57% of the coding sequences (CDSs) encoded on pHCM2 display over 97% DNA sequence identity to the virulence-associated plasmid of Yersinia pestis, pFra. pHCM2 encodes no obvious virulence-associated determinants or antibiotic resistance genes but does encode a wide array of putative genes directly related to DNA metabolism and replication. PCR analysis of a series of S. typhi isolates from Vietnam detected pHCM2-related DNA sequences in some S. typhi isolated before, but not after, 1994. Similar pHCM2-related sequences were also detected in S. typhi isolated from other regions of South East Asia and Pakistan but not elsewhere in the world.
| Original language | English |
|---|---|
| Pages (from-to) | 159-171 |
| Number of pages | 13 |
| Journal | Plasmid |
| Volume | 47 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 May 2002 |
| Externally published | Yes |
Keywords
- Bacteriophage
- Cryptic plasmids
- Gene clusters
- PCR
- pFra plasmid
- Salmonella typhi
- Yersinia pestis
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