Biosecurity & Disease Detection in the Torres Strait - - PowerPoint PPT Presentation

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biosecurity amp disease detection in the torres strait
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Biosecurity & Disease Detection in the Torres Strait - - PowerPoint PPT Presentation

Jul 27, 2023 444 likes •627 views

Project 11.2 Biosecurity & Disease Detection in the Torres Strait A/Professor Susan Laurance, Dagmar Meyer Steiger & Professor Scott Ritchie Emerging Infectious Diseases EBOLA HENDRA EXISTING DISEASE TRANSMITTED TO A NEW HOST

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Project 11.2

Biosecurity & Disease Detection in the Torres Strait

A/Professor Susan Laurance, Dagmar Meyer Steiger & Professor Scott Ritchie

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Emerging Infectious Diseases

HENDRA EBOLA CHYTRID

EXISTING DISEASE TRANSMITTED TO A NEW HOST DISEASE MOVED TO A NEW AREA

AVIAN MALARIA

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  • Disease detection is higher in developed world
  • Disease risk is higher in tropical frontier regions

Understanding Disease Risk

EID Detections EID Risk

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Understanding Disease Emergence

1) Human land use 2) Inadequate disease surveillance

Power CO2 Attractant Novel interactions

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Our research challenge was to work in the Torres Strait – a remote tropical area – and with limited funds

Papua New Guinea Australia

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Step 1: Develop & trial novel mosquito sampling methods for remote regions

Standard CDC mosquito trap with battery & CO2 from dry ice New passive box trap (no power) with CO2 from yeast & sugar

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Field trial results

Dry ice generates more CO2 But importantly the same species are caught with yeast attractant (where mosquitoes are abundant RF & Man). Novel method can replace standard sampling for remote areas!

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Step 2: Field Study in the Torres Strait

X X A comparison of mosquitoes in villages & native habitat on 4 islands, 2 years

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Results

  • ca. 12,000 mosquitoes captured & identified
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Where did we capture the medically important mosquitoes?

SAIBAI BOIGU BADU MOA

Village Bush Village Bush Village Bush Village Bush

Aedes aegypti  Aedes albopictus      Aedes scutellaris        Anopheles farauti  

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Culex sitiens group        

Culex quinquefasciatus

     Mansonia unformis    Verrallina funerea    

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Community Fact Sheet Research Review

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Step 3: A novel method for disease detection in mosquito vectors (& capacity building in North Qld)

  • Sugar-coated FTA cards installed in traps

to collect mosquito saliva

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Attempt to extract viral and parasitic RNA/DNA from FTA Cards for:

– avian & human Malaria – Dengue – Ross River fever – Kunjin – Japanese encephalitis – Chikungunya

  • Q. How effective is this method with low disease incidence?

Step 3: A novel method for disease detection in mosquito vectors (& capacity building in North Qld)

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Step 4: Future research

  • Continue to trial different yeast varieties &

trap modifications

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Conclusions

  • Torres Strait is one of the most “at risk” communities

in Australia with respect to mosquito-borne EID’s

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Policy recommendations to manage EID Risk in Torres Strait

  • Remove larval habitats in

villages – rubbish removal highest priority

  • Fly-screens & treated

bednets

  • New houses - high-set on

hard foundations

  • PNG visitors need to stay

in mosquito-safe environs

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THANK YOU