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Mol.971UF Microbiome in Health and Environment
Three examples of intramicrobiome microbial communication
QS - Quorum sensing (N-acyl-homoserine lactones or peptides) Phenotype adaptation/Biofilm formation
DIET Direct Interspecies Electron Transfer (DIET) important in anaerobic communties
VOCs - Volatile Organic Compounds: long term, long distance, cross kingdom
Mol.971UF Microbiome in Health and Environment
Modern Definition of Microbiome
Characteristic microbial community occupying a defined habitat with distinct physico-chemical properties. Consist of Microbiota + theater of activity and forms an ecological niche.
Mol.971UF Microbiome in Health and Environment
Viruses and Phages are Part of
Microbiome
Mol.971UF Microbiome in Health and Environment
Name three interaction types of microbial interaction
Positive (commensalism, mutualism, symbiotic)
Negative (amensalism, predation, parasitism, antagonism and competition)
Neutral.
Mol.971UF Microbiome in Health and Environment
Three methods used for community fingerprinting
DGGE/TGGE Denaturing/Temperatur Gradient Gel Electrophoressis
T-RFLP Terminal Restriction Fragments Length Polymorphism
SSCP PCR-Single Strand Conformation Polymorphism
Mol.971UF Microbiome in Health and Environment
Name Characteristics associated with Eubiosis and Dysbiosis
Eubiosis: high diversity, high abundance, tight network, low presence of potential pathogens
Dysbiosis: low diversity, low abundance, loose network, high presence of potential pathogens
Mol.971UF Microbiome in Health and Environment
The cleaning regimen in a constricted environment like a hospital has what effect on the Microbiom?
Reduction of diversity, increase in abundance of antibiotic resistance. Shift from Gram+->Gram+.
Mol.971UF Microbiome in Health and Environment
5 Steps in the Workflow from Sample to (Meta)Genome or Amplicon.
1 Sampling (Sampling, Storing, Enrichment)
2 Processing (Extraction, Library prepartion)
3 Sequencing (Illumina, Pacbio, Oxford Nanopore)
4 Bioinformatics (Quality fitering, Clustering, Taxonomic/Functional Profiling, Comparative analysis, Visualisation
5 Publishing/Storing
Mol.971UF Microbiome in Health and Environment
What markers are commonly used for Amplicon Sequencing?
16S rRNA, 18S rRNA and ITS Internal trancribed spacers
Mol.971UF Microbiome in Health and Environment
Name 4 Omic methods that complement each other in microbiome research
Genomics (DNA)
Transcriptomics (RNA)
Proteomics (Proteins)
Metabolomics (Metabolites)
Mol.971UF Microbiome in Health and Environment
What are the differences between Top Down, Middle down, Bottom up approaches in Proteomics
Size of Protein/Peptide. Top-Down single Proteins are analyzed.
Middle down: Proteinmix is digested first, separated and peptides are analyzed
Bottom up: Proteinmix is digested into smaller fragments than middle down.
Mol.971UF Microbiome in Health and Environment
Define core microbiota
The stable species (and or functions) within a microbiome.
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