New York State Health Department's experience with implementing Whole Genome Cluster Analysis for Salmonella outbreak investigations
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1 New York State Health Department's experience with implementing Whole Genome Cluster Analysis for Salmonella outbreak investigations William Wolfgang Wadsworth Center NYSDOH InForm /20/13
2 Current typing methods are poor at resolving clusters in S. Enteritidis PFGE type frequency MLVA type frequency B G BQ F J W I D AI BN AC E AG V AB AF BD MLVA-PFGE type frequency B4 B34 G4 B21 BQ8 I5 W4 J4 D4 BN692 AI19 AC2 F2 V4 AG56 J21 52 PFGE types 98 MLVA types 163 combined MLVA-PFGE types
3 Outbreaks are rarely detected for the most common PFGE patterns 2010 Outbreaks Montevideo - salami. Typhimurium - residential facility for the developmentally disabled. Javiana - tomatoes. Saintpaul - restaurant. Enteritidis - long term care facility (4) Outbreaks Typhimurium - aquatic frogs. Heidelberg - ground turkey. Enteritidis - food worker at a deli (692). Typhimurium - ground beef. Enteritidis -Turkish pine nuts (8) Outbreaks Bareilly - sushi. Nchanga sushi. Hartford - sub shop worker. Newport - chick and duck exposure. SanDiego & Poona - small turtles. Javiana - Mothers Day fruit baskets. Enteritidis - Cargill ground beef (9).
4 Retrospective studies have shown that WGS improves pathogen tracking and surveillance MRSA Tb Drug resistant Klebsiella pneumoniae Cholera outbreak in Haiti. Salmonella Montevideo outbreak from pepper.
5
6 Acknowledgments Cornell Martin Wiedmann Henk den Bakker FDA Eric Brown Peter Evans Marc Allard Errol Strain Ruth Timme Connecticut DOH Stacey Kinney John Fontana Wadsworth Center Genomics Core Matt Shudt Zhen Zhang Charles MacGowan Mark Rosenthal Melissa Leisner Mike Palumbo Pascal LaPierre Wadsworth PulseNet Lab Dianna Bopp Deb Baker Lisa Thompson NCBI Bill Klimke
7 WGCA can identify an outbreak cluster not detected by PFGE All isolates JEGX01.004
8 In the summer of 2012 sequenced all Pattern 4 and 21 Sequenced 93 3 PFGE types 12 WGS clusters Some are persistent Some are short term Are these additional clusters linked? Should we use this as a routine surveillance tool?
9 Pilot study to assess utility of whole genome cluster analysis is WGS better than PFGE for cluster and outbreak detection? 1. Improve resolution 2. More rapid detection 3. Improve identification of outbreaks and sources can WGS match or improve upon PFGE s cost, turn around time? 1. Reagent costs 2. Technician time 3. Turn around times 4. Scalability and portability
10 We are sequencing all S. Enteritidis in real time Sequencing is performed on a MiSeq Since early October we have been doing one run a week Sequence 12 isolates in a run Quality and phylogenetic analysis are performed in house Clusters are identified and reported to our state epidemiologists
11 Current work flow takes about 1 week Isolation and Serotyping 2 days As accessioned DNA extraction 3 hours Thursday or Friday Library prep 1.5 days Monday - Tuesday Run on MiSeq 40h Tuesday - Thursday morning In house cluster analysis Few hours Thursday or Friday Clusters are identified Reports sent to state epidemiologists Thursday or friday
12 Week 2
13 Week 3
14 Week 4
15 Genomic Surveillance Machine State labs feed the machine by uploading sequences from isolates received through surveillance. Federal and other support for reagents and equipment. NCBI to analyze the products of this machine and reports results to state and federal agencies.
16 Current FDA Genome Trackr network State Health labs New York Florida Arizona Washington Minnesota Virginia Maryland FDA labs 9 FDA field labs CFSAN - MOD1 CFSAN - Wiley IEH (contracting lab) International labs Mexico Ireland UK (FERA) Columbia Contributors Turkey Brazil Italy
17 Building a pathogen reference database at NCBI Data Generation 18 State and Federal Health labs Data transfer Data QC and Submission at FDA Register strains with NCBI Illumina MiSeq Data Generation Data transfer to FDA Batch QC of data Conversion to SRA format Upload to SRA Automated WGS accessions Genome assembly + PGAP annotation Hybrid k-mer and reference-based SNP calling analysis NCBI pathogen detection pipeline BioProject:
18 NCBI Salmonella tree 1366 isolates Wadsworth isolate
19 GC-1 cluster on NCBI Salmonella tree GC-1
20 Expected Outcomes for WGS surveillance Laboratory Improve outbreak cluster detection. Clusters will be detected more rapidly and from fewer isolates. Epi Allow identification of clusters within endemic patterns. Allow more efficient use of resources by focusing on highly genetically related clusters. Solve more clusters. Public Health More efficient identification and removal of pathogen sources.
21 Challenges exist Creating a network Should data be public (Metadata) In real time? What elements? As sequencing technology and bioinformatics evolve: Need to maintain backward compatibility Improving efficiency. What will it cost and who pays?
22 Future Near term Universal Salmonella tree Hands off data submission to NCBI Hands off data analysis Further out Entire process automated Sample preparation Sequencing Identification of clusters Reporting
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