Regional FMD Situation...2019/12/01 · Improved FMD sampling and molecular typing would improve...
Transcript of Regional FMD Situation...2019/12/01 · Improved FMD sampling and molecular typing would improve...
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SEACFMD Laboratory Network Meeting
4-5 November 2019, Pakchong, Thailand
Dr Yu Qiu
Regional FMD Situation
OIE Project Officer
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▪ Regional FMD Situation, 2017-2019
▪ Regional updates on O/ME-SA/Ind2001
▪ Risk of Asia-1 FMD
Agenda
▪ Conclusions
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Part 1
Regional FMD situation
2017-present
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Pool 1
Pool 2Pool 3
Pool 4
Pool 6
Pool 5
Pool 7
OIE Global status • O/Mya-98
• O/PanAsia
• O/ME-SA/Ind-2001
• O/Cathay
• A/SEA-97
• Serotype Asia 1
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No. Outbreaks
Cambodia 57
PR China 13
Lao PDR 12
Malaysia 28
Mongolia 44
Myanmar 16
Thailand 147
Viet Nam 13
FMD outbreaks, 2017
330 outbreaksA
5.0%
O42.8%
Untyped51.8%
Asia 10.3%
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No. Outbreaks
Cambodia 57
PR China 13
Lao PDR 12
Malaysia 28
Mongolia 44
Myanmar 16
Thailand 147
Viet Nam 13
FMD outbreaks, 2018
A8.9%
O43.9%
Untyped47.2%
458 outbreaks
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A10.5%
O7.9%
Untyped81.6%
152 outbreaks
FMD outbreaks, 2019 (till Sept)
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Genotyping of FMDVs2017
CountrySerotype
OTopotype…
Serotype A
TopotypeSerotype
Asia1
SEA/Mya-98
ME-SA/PanAsia
ME-SA/Ind-2001
CathayASIA/
Sea-97Asia/
G-VIII
Cambodia + + + + +
China + + + + +
Lao PDR + + +
Myanmar + + + +
Malaysia + +
Mongolia + + + + + +
Thailand + + + + + +
Viet Nam + + + + + + +
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Genotyping of FMDVs2018
CountrySerotype
OTopotype…
Serotype A
TopotypeSerotype
Asia1
SEA/Mya-98
ME-SA/PanAsia
ME-SA/Ind-2001
CathayASIA/
Sea-97Asia/
G-VIII
Cambodia + +
China + + + + + + +
Lao PDR + + + +
Myanmar + +
Malaysia + +
Mongolia + + + +
Thailand + + + + + +
Viet Nam + + + +
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Genotyping of FMDVs2019 (till Sept)
CountrySerotype
OTopotype…
Serotype A
TopotypeSerotype
Asia1
SEA/Mya-98
ME-SA/PanAsia
ME-SA/Ind-2001
CathayASIA/
Sea-97Asia/
G-VIII
Cambodia + +
China + + +
Lao PDR
Myanmar +
Malaysia +
Mongolia
Thailand + + + +
Viet Nam + +
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How to improve FMDV molecular
epidemiological investigation
Surveillance Reporting Sampling Lab diagnosis
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How to improve FMDV molecular
epidemiological investigation
Surveillance Reporting Sampling Lab diagnosis
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Establishment of FMD Laboratory
Regional Expert Group
1st REG-FMD meeting, 14 – 16 May 2019, Bangkok Thailand
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Proposed FMD Molecular Diagnostic Scheme
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Sample collection
Sample preservation
Sample submission
(transportation)
Virus isolation Molecular typing
• A summary table for FMD sampling
for lab diagnosis (all species)
• A draft regional protocol for probang
samples (ruminants)
• A draft regional protocol for swab
samples (all species)
• A draft regional protocol for FTA
Cards (all types of samples)
Discussed at Session 1Agree not to explore a regional technical
guideline on cell culture and VI
LVRI
(all REG members)
LVRI
(YASVI+Pakchong)
AAHL
(APQA+LVRI)
AAHL
Development of SOPs for robust FMD field sampling
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Part 2
Risk of O/ME-SA/Ind2001
Updated regional situation
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O/Ind2001d
2015
Apr
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Apr
May
O/Ind2001d
2015
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Apr
May
Oct
O/Ind2001d
2015
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Apr
May
Oct
O/Ind2001e
2015
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O/Ind2001
2015
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O/Ind2001
2016
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O/Ind2001
2017
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O/Ind2001
2018
O/Ind2001 present country
Unknown status
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Part 2
Risk of Asia-1 FMD
Follow up investigation in Myanmar
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Serotype Asia 1 in Myanmar in January 2017
No further Asia 1 outbreaks reported so far
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Asia-1 FMD outbreak in Myanmar
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Asia-1 FMDV Serosurveillance
• NZ vaccination project baseline survey
• Cattle sera collected from end 2016 to early 2017
• 51 samples from 18 villages sent to WRL for VNT against Type Asia-1
Study 1
Sampled village
Asia-1 positive village by VNT
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Asia-1 FMDV Serosurveillance
• NZ vaccination project baseline survey
• 6 sera samples from 3 villages tested positive against Asia-1 by VNT
• 5 samples inconclusive, 40 samples negative
Study 1
Sampled village
Asia-1 positive village by VNT
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Asia-1 FMDV SerosurveillanceStudy 2
• STANDZ FMD serosurveillance study
• Sera collected from all susceptible species in early 2018
• 152 sera samples from 41 villages tested positive against Type Asia-1 and negative against Types O and A in the screening LP ELISA tests in Myanmar
• Confirmatory test by VNT against Asia-1 at WRL
Sampled village
Asia-1 positive village by VNT
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Asia-1 FMDV SerosurveillanceStudy 2
• STANDZ FMD serosurveillance study
• Only 1 sample tested positive against Asia-1 by VNT at WRL
• 8 inconclusive, 144 negative
Sampled village
Asia-1 positive village by VNT
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2nd REG-FMD meeting on serology
Finalized recommendations will be shared with the SEACFMD LabNet
31 Oct - 1 Nov 2019, Bangkok, Thailand
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Serotype A variant in Laos in 2018<95% identity to all known type A viruses
clinical outbreaks in Oct 2018
A/SEA-97 Strain
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Conclusion
▪ Upsurge in serotype A outbreaks has been noted in 2019, especially
in Thailand; genetic drift serotype A variant was detected in
Southern Laos.
▪ O/ME-SA/Ind2001 lineage has been continuously circulating in the
region since its introduction.
▪ Improved FMD sampling and molecular typing would improve our
knowledge of molecular epidemiology.
▪ The probability of silent circulation of type Asia-1 FMDV at low levels
can not be excluded. Serological surveillance can be complicated by
animals’ vaccination status and cross-reactivity between different
serotypes; robust virological surveillance is preferred to monitor
Asia-1 FMDV status.
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THANKS FOR YOUR ATTENTION!