27 Lecture Bacteria
... • A donor cell attaches to a recipient by a pilus, pulls it closer, and transfers DNA • A piece of DNA called the F factor is required for the production of pili ...
... • A donor cell attaches to a recipient by a pilus, pulls it closer, and transfers DNA • A piece of DNA called the F factor is required for the production of pili ...
Enter Topic Title in each section above
... Q. Name two forms of heterotrophic Q. What is the function of flagella? nutrition found in bacteria. A. Parasitic; Saprophytic A. Movement Q. Why are antibiotics not prescribed for a person suffering from a viral infection? A. Antibiotics have no effect on ...
... Q. Name two forms of heterotrophic Q. What is the function of flagella? nutrition found in bacteria. A. Parasitic; Saprophytic A. Movement Q. Why are antibiotics not prescribed for a person suffering from a viral infection? A. Antibiotics have no effect on ...
Objectives to Review
... o uninfected mosquito gets infected by biting an infected person o in mosquito's intestine, male & female gametocytes form a zygote o zygote is the mature parasite o zygote undergoes meiosis (sexual reproduction) making juvenile forms of parasite that migrates to salivary gland o mosquito bites a hu ...
... o uninfected mosquito gets infected by biting an infected person o in mosquito's intestine, male & female gametocytes form a zygote o zygote is the mature parasite o zygote undergoes meiosis (sexual reproduction) making juvenile forms of parasite that migrates to salivary gland o mosquito bites a hu ...
video slide - Course Notes
... Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings ...
... Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings ...
______________________________________________________________________ Análisis de la composición del regulón LexA en el dominio Resumen
... Previous studies carried out in our laboratory have analyzed the content of the LexA regulon of Gamma proteobacterias (Erill et al., 2003). Following the same line, the present work tries to extend the description of this regulon to other families of the Bacteria Domain: Geobacter sulfurreducens, re ...
... Previous studies carried out in our laboratory have analyzed the content of the LexA regulon of Gamma proteobacterias (Erill et al., 2003). Following the same line, the present work tries to extend the description of this regulon to other families of the Bacteria Domain: Geobacter sulfurreducens, re ...
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... acquisition of two mechanisms: an effluxmediated mechanism encoded by tetK or tetL genes and ribosomal protection proteins, which protect the ribosome from the action of tetracycline, mediated by tetM, tetO, tetS, tetP, tetQ and tetU resistant determinant (Hraoui et al., 2012). Tetracycline is a bro ...
... acquisition of two mechanisms: an effluxmediated mechanism encoded by tetK or tetL genes and ribosomal protection proteins, which protect the ribosome from the action of tetracycline, mediated by tetM, tetO, tetS, tetP, tetQ and tetU resistant determinant (Hraoui et al., 2012). Tetracycline is a bro ...
Research in Microbiology
... predicted (Schleheck et al., 2004). In another strain, C. testosteroni CNB-2 (CP001220), eight putative ZntA-like genes and 6 CzcCBA operons were found (Ma et al., 2009). However, this was solely based on in silico predictions since their physiological function has not been investigated. The objecti ...
... predicted (Schleheck et al., 2004). In another strain, C. testosteroni CNB-2 (CP001220), eight putative ZntA-like genes and 6 CzcCBA operons were found (Ma et al., 2009). However, this was solely based on in silico predictions since their physiological function has not been investigated. The objecti ...
No Slide Title
... Fig. 4.4 The operation of flagella and the mode of locomotion in bacteria with polar and peritrichous flagella. ...
... Fig. 4.4 The operation of flagella and the mode of locomotion in bacteria with polar and peritrichous flagella. ...
Bacteria - General - Austin Community College
... build up of toxins no true sexual reproduction but due to rapid life cycles, natural mutations are the main source of genetic variations but can exchange genetic material in several ways: transformation conjugation transduction ...
... build up of toxins no true sexual reproduction but due to rapid life cycles, natural mutations are the main source of genetic variations but can exchange genetic material in several ways: transformation conjugation transduction ...
The ways in which bacteria resist antibiotics
... produced by microorganisms, with selective antibacterial activity that does not have any strong effects on human cells. Their mechanism of action is either through killing the bacteria (bactericidal effect) or by inhibiting bacterial growth (bacteriostatic effect). With the advent of synthetic antib ...
... produced by microorganisms, with selective antibacterial activity that does not have any strong effects on human cells. Their mechanism of action is either through killing the bacteria (bactericidal effect) or by inhibiting bacterial growth (bacteriostatic effect). With the advent of synthetic antib ...
gene amplification and genomic plasticity in prokaryotes
... Amplification). Tandem duplications generally do not lead to loss of gene function (2, 93). Recombination between any pair of long repeated sequences, sharing an adequate level of identity, may possibly foster the formation of tandem duplications. Given the paucity of these sequences in enterobacter ...
... Amplification). Tandem duplications generally do not lead to loss of gene function (2, 93). Recombination between any pair of long repeated sequences, sharing an adequate level of identity, may possibly foster the formation of tandem duplications. Given the paucity of these sequences in enterobacter ...
Inclusion of an upstream transcriptional terminator in phage display
... uninduced E. coli cultures harboring a typical phage display vector indicated that tight regulation of lac promoter controlled expression is very important for securing of comparable growth conditions for less toxic and more toxic coat protein fusions during library propagation steps. In our hands, ...
... uninduced E. coli cultures harboring a typical phage display vector indicated that tight regulation of lac promoter controlled expression is very important for securing of comparable growth conditions for less toxic and more toxic coat protein fusions during library propagation steps. In our hands, ...
Document
... • Under what circumstances might individual bacterial strains be tested against a variety of antibiotics? –To see if a bacterium causing an infection can be controlled by a specific antibiotic/find the best one (for a particular patient) •Under what circumstances might individual antibiotics be tes ...
... • Under what circumstances might individual bacterial strains be tested against a variety of antibiotics? –To see if a bacterium causing an infection can be controlled by a specific antibiotic/find the best one (for a particular patient) •Under what circumstances might individual antibiotics be tes ...
PDF
... screening allowed us to find several virulence determinants such as collagen adhesins, aggregation substances, mucus-binding proteins, and hemolysins in some species. Moreover, we detected several antibiotic resistance-encoding genes, whose presence could increase the potential pathogenicity of some ...
... screening allowed us to find several virulence determinants such as collagen adhesins, aggregation substances, mucus-binding proteins, and hemolysins in some species. Moreover, we detected several antibiotic resistance-encoding genes, whose presence could increase the potential pathogenicity of some ...
Mechanisms of bacterial resistance to antibiotics - Micro-Rao
... Mutational narrowing of porin channels 4. Active efflux Mutational overexpression of efflux pumps Plasmid mediated novel efflux pumps Mutations making efflux-pump more efficient at export 5. Antibiotic sequestration: Multilayered thick cell wall binds to antibiotics (glycopeptide resistance ...
... Mutational narrowing of porin channels 4. Active efflux Mutational overexpression of efflux pumps Plasmid mediated novel efflux pumps Mutations making efflux-pump more efficient at export 5. Antibiotic sequestration: Multilayered thick cell wall binds to antibiotics (glycopeptide resistance ...
Rhodothemus obamensis sp. nov., a Modern Lineage of Extremely
... marinus is an aerobic heterotrophic bacterium that has an optimum growth temperature of 65°C and has been used in studies of genetic engineering of thermostable enzymes (28). A 16s rRNA analysis of this organism placed the genus Rhodothermus close to the root of the Flexibacter-Cytophaga-Bacteroides ...
... marinus is an aerobic heterotrophic bacterium that has an optimum growth temperature of 65°C and has been used in studies of genetic engineering of thermostable enzymes (28). A 16s rRNA analysis of this organism placed the genus Rhodothermus close to the root of the Flexibacter-Cytophaga-Bacteroides ...
Chapter 27- Prokaryotes and the Origin of Metabolism
... chemical elements need to be recycled between biological (organic) and chemical (inorganic) parts of ecosystem Thus, Bacteria such as decomposers are required to convert carbon, nitrogen and other elements essential to life between biological and physical systems. ...
... chemical elements need to be recycled between biological (organic) and chemical (inorganic) parts of ecosystem Thus, Bacteria such as decomposers are required to convert carbon, nitrogen and other elements essential to life between biological and physical systems. ...
Honours project list
... material. Treatment processes of sewage produce biosolids as well as reclaimed water. For biosolids, the ultimate aim is to generate material that is free from microbial pathogens and is safe to use for fertilising agricultural crops. While standard methods have been developed to estimate the pathog ...
... material. Treatment processes of sewage produce biosolids as well as reclaimed water. For biosolids, the ultimate aim is to generate material that is free from microbial pathogens and is safe to use for fertilising agricultural crops. While standard methods have been developed to estimate the pathog ...
... The dye EMA is selectively amplified DNA from living cells and make loss of dead cells’ DNA by intercalating to the double stranded DNA and this principle is reported in many studies [12], [13] The applicability of EMA is also reported in other study such as for the bacterial diagnosis. [14] However ...
enteric bacteria
... The mycoplasma group contains organisms that lack cell walls and contain a very small genome. Many species require sterols to strengthen their membranes, and several are pathogenic for humans, other animals, and plants. Major characteristics of mycoplasmas are shown in Table 12.28. ...
... The mycoplasma group contains organisms that lack cell walls and contain a very small genome. Many species require sterols to strengthen their membranes, and several are pathogenic for humans, other animals, and plants. Major characteristics of mycoplasmas are shown in Table 12.28. ...
Microbial Metabolism
... neutral products from glucose (e.g. ethyl alcohol, acetyl methyl carbinol). In this neutral pH the growth of the bacteria is not inhibited. The bacteria thus begin to attack the peptone in the broth, causing the pH to rise above 6.2. At this pH, methyl red indicator is a yellow color (a negative MR ...
... neutral products from glucose (e.g. ethyl alcohol, acetyl methyl carbinol). In this neutral pH the growth of the bacteria is not inhibited. The bacteria thus begin to attack the peptone in the broth, causing the pH to rise above 6.2. At this pH, methyl red indicator is a yellow color (a negative MR ...
Origins of Flagellar Gene Operons and Secondary Flagellar Systems †
... more notable differences is the difference between the spirochetes, which possess periplasmic flagella whose filaments reside between the outer and cytoplasmic membranes, and other species whose filaments are situated outside the cells (8). In some bacteria, such as Vibrio parahaemolyticus, there ar ...
... more notable differences is the difference between the spirochetes, which possess periplasmic flagella whose filaments reside between the outer and cytoplasmic membranes, and other species whose filaments are situated outside the cells (8). In some bacteria, such as Vibrio parahaemolyticus, there ar ...
Horizontal gene transfer
Horizontal gene transfer (HGT) refers to the transfer of genes between organisms in a manner other than traditional reproduction. Also termed lateral gene transfer (LGT), it contrasts with vertical transfer, the transmission of genes from the parental generation to offspring via sexual or asexual reproduction. HGT has been shown to be an important factor in the evolution of many organisms.Horizontal gene transfer is the primary reason for bacterial antibiotic resistance, and plays an important role in the evolution of bacteria that can degrade novel compounds such as human-created pesticides and in the evolution, maintenance, and transmission of virulence. This horizontal gene transfer often involves temperate bacteriophages and plasmids. Genes that are responsible for antibiotic resistance in one species of bacteria can be transferred to another species of bacteria through various mechanisms (e.g., via F-pilus), subsequently arming the antibiotic resistant genes' recipient against antibiotics, which is becoming a medical challenge to deal with.Most thinking in genetics has focused upon vertical transfer, but there is a growing awareness that horizontal gene transfer is a highly significant phenomenon and among single-celled organisms perhaps the dominant form of genetic transfer.Artificial horizontal gene transfer is a form of genetic engineering.