GB/T 23797-2020 in English
VALIDSurveillance methods for vector density—Mosquito
- Issued on:2020-11-19
- Implemented on:2021-06-01
- File Format:PDF
- Delivery:Via email within 5 business days
$359.00
《GB/T 23797-2020病媒生物密度监测方法 蚊虫》由361（国家卫生健康委员会）归口，主管部门为国家卫生健康委员会。
Introduction
Background of Standard Revision and Technological Evolution
GB/T23797-2020, as the core standard in the field of vector-borne organism monitoring, reflects the significant progress of my country's mosquito control technology. Compared with the 2009 version, this standard adds five new monitoring methods, including BG-Trap method and handheld mosquito sampler method, optimizes the application scenarios of equipment such as carbon dioxide mosquito traps, and reflects the transformation from traditional manual monitoring to intelligent and precise monitoring.
Comparison of core monitoring methods
| Monitoring methods | Applicable objects | Technical improvements | Density units |
|---|---|---|---|
| BG-Trap method | Aedes albopictus/Aedes aegypti | New Lure attractant system | Individuals/(individuals·d) |
| Double-layer mosquito net method | Outbreak areas of vector mosquitoes | Double-net isolation design | Individuals/(top·h) |
| Ovulation cup method | Aedes eggs monitoring | Standardized egg-laying plate design | pcs/(bar·d) |
Key technology innovation
1. Upgrade of carbon dioxide mosquito trap method
The new version of the standard specifies that the carbon dioxide flow rate should be controlled at 100-500mL/min, and dry ice is added as an alternative gas source, which improves the monitoring efficiency by 30%. The measured data of a disease control center showed that after the optimized parameters were adopted, the capture of Culex pipiens increased from 15/unit night to 21/unit night.
2. Quantitative improvement of larval monitoring
The calculation formula symbol of the 100-household index (Formula 15) was re-standardized. When monitoring Aedes albopictus/Aedes aegypti, the index was renamed the Breto Index (BI). The newly added path method is suitable for rapid community assessment, and its path index calculation is shown in Formula 21:
TI = number of positive sites/number of kilometers walked
Implementation suggestions
- The combined scheme of double-layer mosquito net method and BG-Trap method is preferred for monitoring in epidemic areas
- Community assessment recommends conducting joint monitoring of the larval scoop trap method (Formula 19-20) and the egg-luring cup method (Formula 25-26) once a month
- Data records must be fully filled in the three major monitoring forms in Appendix A, paying special attention to the recording of environmental parameters such as temperature and humidity
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