Genomic and epidemiological evidence linking a pre-season dengue case to local overwintering transmission in Guangdong, China
PLOS Neglected Tropical Diseases·
- DOI
- 10.1371/journal.pntd.0014221
- PMID
- —
- PMCID
- —
- OpenAlex
- —
- Study type
- Genomic study
- Publisher
- Public Library of Science (PLoS)
- Article type
- journal-article
- Integrity
- current
Why this research matters now
The observation indicates that viral persistence across off-season periods may occur in warming subtropical zones, highlighting the necessity for continuous mosquito monitoring programs.
Structured evidence summary
Research question
What was the likely source of an unusually early locally acquired dengue infection in Guangdong, specifically whether it originated from prior regional circulation or a fresh external introduction?
Study design
The investigation integrated retrospective patient interviews, localized environmental sampling, virological diagnostics, and viral genome sequencing to trace infection origins.
Population and setting
A single resident of Guangdong Province, China, with recent exposure history concentrated around specific nearby locations.
Main findings
Viral genetic sequencing demonstrated near-complete similarity between the current pathogen and a strain isolated during the preceding year, indicating sustained local circulation rather than external introduction. Concurrent environmental monitoring documented favorable thermal conditions for vector activity during the patient’s potential exposure period.
Public-health relevance
The observation indicates that viral persistence across off-season periods may occur in warming subtropical zones, highlighting the necessity for continuous mosquito monitoring programs.
Important limitations
The analysis centers on a solitary patient encounter, which inherently limits statistical power and broad regional applicability.
GIDS interpretation
This publication documents a singular early-season occurrence and associated genetic tracing, offering contextual background on regional viral behavior without establishing active outbreak metrics or real-time detection trends.
Related GIDS surveillance
Literature context does not validate, explain, or change a surveillance signal. Exact and contextual relationships are shown separately.
Evidence relationships
This article has 11 auditable classifier relationships to diseases, places, topics, and study design.