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SARS: A Multidisciplinary Exploration Nitya Jacob Doug Graham Eloise Carter Manish Chakrabarti
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Teaching with an Epidemic SARS as a topic to introduce problem solving in biology, medical epidemiology and bioinformatics Diverse sources of information on SARS used to introduce the topic Platform for developing questions that engage students Use of existing data/information to develop analysis skills for future projects
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SARS – Severe Acute Respiratory Syndrome Coronovirus – SARS CoV Global epidemic 2003 8,000 cases, 24 countries Spread by respiratory droplets
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SARS - Symptoms High fever > 100oC Headaches Body aches and pains All pneumonia
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SARS – Integrating Topics Biogeography Epidemiology/Biology Detection and Diagnosis Time Line Genome Phylogeny Bioinformatic Tools Public Health – Quarantine, Education, etc. Vaccine Development
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Questions to Explore Evolution/variation of sequences encoding specific proteins (Orf 1ab vs. spike) Differences between Coronaviruses Differences between strains from China and Taiwan vs. strains transmitted to North America
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SARS Sequences Available FULL GENOME SEQUENCES TOR2 SIN2500, SIN2748, SIN2774, SIN2677, SIN2679 URBANI HKU39849 BJO1 HKU39849 CUHKUW1, CUHK-Su10 LLJ-2004 HSR1 – Italy Frankfurt 1 Sino1-11 GD01 www.ncbi.nlm.nih.gov Salemi et al, 2004
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SARS Protein Sequences Spike glycoprotein (S) Replicase polyprotein (Orf1ab) Nucleocapsid (N) Membrane protein (M) www.ncbi.nlm.nih.gov
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Epidemiology Origin of SARS coronavirus? Case definition Factors (biological/cultural) contributing to global spread
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Bioinformatics Target Audience: Computer Science, Math and Statistics students. Exploration Ideas: Search NCBI for the complete SARS Co-v genome (Accession number: NC_004718) NC_004718 Download the entire sequence in FASTA format (goal: learn about FASTA) Now download the sequence in XML format (learn about the different XML formats such as GBSeqXML, TinySeqXM, etc.)
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SARS Resources Epidemic! The Natural History of Disease at the San Diego Natural History Museum www.sdnhm.org/exhibits/epidemic/resources.html www.sdnhm.org/exhibits/epidemic/resources.html Useful site for additional web links and info http://microvet.arizona.edu/Courses/MIC438/collectjc04. html (images above) http://microvet.arizona.edu/Courses/MIC438/collectjc04. html http://microvet.arizona.edu/Courses/MIC438/collectjc04. html CDC information http://www.cdc.gov/ncidod/EID/vol5no2/snacken.htm http://www.cdc.gov/ncidod/EID/vol5no2/snacken.htm Maps and photos http://www.geo.arizona.edu/Antevs/nats104/00lect24sars.html (images above) http://www.geo.arizona.edu/Antevs/nats104/00lect24sars.html http://www.geo.arizona.edu/Antevs/nats104/00lect24sars.html
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Resources for Evolution and Phylogeny Salemi et al. 2004. “Severe Acute Respiratory Syndrome Coronavirus sequence characteristics and evolutionary rate estimate from maximum likelihood analysis”. J of Virology 78:1602-1603. Chinese SARS Molecular Epidemiology Consortium. 2004. “Molecular evolution of the SARS coronavirus during the course of the SARS epidemic in China.” Science 303:1666-1669. Lan et al. 2005. “Phylogenetic analysis and sequence comparison of structural and non-structural SARS coronavirus proteins in Taiwan.” Infect. Genet. Evol. 5:261-9
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Resources for Bioinformatics Complete SARS Genome Unique and conserved features of genome and proteome of SARS-coronavirus, an early split-off from the coronavirus group 2 lineage - Snijder,E.J at al, J. Mol. Biol. 331 (5), 991-1004 (2003) PUBMED 12927536 12927536
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Conclusions This approach could be used in other areas of study Epidemic diseases capture interest and integrate diverse skills and concepts Meaningful connection of bioinformatics to timely and engaging problems Find your favorite disease!
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