1. AUSTRALIA INDONESIA PARTNERSHIP FOR EMERGING INFECTIOUS DISEASES Basic Field Epidemiology Session 9 – Collecting data and counting cases

2. AUSTRALIA INDONESIA PARTNERSHIP FOR EMERGING INFECTIOUS DISEASES

3. In this session we will talk about: How to collect data and count cases of disease

4. AUSTRALIA INDONESIA PARTNERSHIP FOR EMERGING INFECTIOUS DISEASES Activity Task for everyone to do: Now we understand what a case definition is – 1. How might you go about collecting information about cases and non-cases?

5. AUSTRALIA INDONESIA PARTNERSHIP FOR EMERGING INFECTIOUS DISEASES Video Show recorded PowerPoint file for Session 9

6. AUSTRALIA INDONESIA PARTNERSHIP FOR EMERGING INFECTIOUS DISEASES After watching the recorded PowerPoint In this video we learnt about – How to collect data on cases and non-cases Task for everyone to do: 1.Revisit your ideas to questions prior to the video. Have your views changed?

7. AUSTRALIA INDONESIA PARTNERSHIP FOR EMERGING INFECTIOUS DISEASES Group activity – Investigation of FMD in a Thai village Background information Village in Lampang Province with 91 households owning cattle (beef cattle and buffalo). Outbreak reported to authorities on 29 January. Investigation team visited and collected detailed information on the progression of the outbreak (typed as Asia 1). There has been some vaccine use in the past (type O vaccine) but only few cattle were vaccinated.

8. AUSTRALIA INDONESIA PARTNERSHIP FOR EMERGING INFECTIOUS DISEASES Group activity –FMD in a Thai village using case & non-case data We can use case & non-case data to produce % estimates 1.How can we use these estimates to assess disease occurrence and severity in different groups of animals? In a defined outbreak where the denominator is all animals at risk of getting the disease, the estimates are called attack rates (AR)

9. AUSTRALIA INDONESIA PARTNERSHIP FOR EMERGING INFECTIOUS DISEASES Never sick FMD cases Total animals Total cases Animal typeAgeMildSevereDied Beef cattle< 1 y old154923015 Adults902123013444 Buffalo< 1 y old13800218 Adults124331015834 FMD cases BeefBuffalo Week 110 Week 2159 Week 32022 Week 41511 Week 550 Week 620 Week 710

10. AUSTRALIA INDONESIA PARTNERSHIP FOR EMERGING INFECTIOUS DISEASES Group activity – FMD in a Thai village 2.Are young animals more likely to get FMD than older animals? BreedAgeCasesTotal Beef<1 yr1530 Adult44134 Buffalo<1 yr821 Adult34158 Combined<1 yr2351 Adult78292

11. AUSTRALIA INDONESIA PARTNERSHIP FOR EMERGING INFECTIOUS DISEASES Group activity – FMD in a Thai village 2.Are young animals more likely to get FMD than older animals? BreedAgeCasesTotal% (AR)Ratio (RR) Beef<1 yr153050.01.52 Adult4413432.81 Buffalo<1 yr82138.11.77 Adult3415821.51 Combined<1 yr235145.11.69 Adult7829226.71

12. AUSTRALIA INDONESIA PARTNERSHIP FOR EMERGING INFECTIOUS DISEASES In this session we talked about: Ideas on how to collect data and count cases of disease

13. AUSTRALIA INDONESIA PARTNERSHIP FOR EMERGING INFECTIOUS DISEASES Improve your job satisfaction Better animal health for Indonesia Key concepts of session 9 Data on cases and non-cases comes from – Asking the farmer questions – Direct observation of signs of disease from the animal – Laboratory results