The take home message: The burden of infectious disease in the
... • Consist of nucleic acid (DNA or RNA) and protein • Sometimes surrounded by membrane (envelope) – Affects how well they survive in the environment ...
... • Consist of nucleic acid (DNA or RNA) and protein • Sometimes surrounded by membrane (envelope) – Affects how well they survive in the environment ...
growth and reproduction of bacteria
... doubling)) time It is the time, covering the beginning of division of the mother cell up to the formation of two new cells. The average generative time is about 20 – 30 minutes in a majority of medically important bacteria. They are some exceptions among pathogenic bacteria: ...
... doubling)) time It is the time, covering the beginning of division of the mother cell up to the formation of two new cells. The average generative time is about 20 – 30 minutes in a majority of medically important bacteria. They are some exceptions among pathogenic bacteria: ...
Chapter 13 – Microbe-Human Interactions: Infection, Disease, and
... Colonizers of the Human Skin Skin is a complex tissue (fig. 13.3a). 1. epidermis – outermost layers of mostly dead epithelial cells continuously sloughs off to be replaced by new living epithelial cells immediately below. 2. dermis - second layer of skin cells; penetrated by nerves, blood vessels an ...
... Colonizers of the Human Skin Skin is a complex tissue (fig. 13.3a). 1. epidermis – outermost layers of mostly dead epithelial cells continuously sloughs off to be replaced by new living epithelial cells immediately below. 2. dermis - second layer of skin cells; penetrated by nerves, blood vessels an ...
Prokaryotic organisms
... Autotrophic Bacteria • organism that makes organic compounds from inorganic sources • synthesize organic compounds from carbon dioxide and other inorganic elements (CO2, H2S) or molecules • using either light energy or chemical energy. ...
... Autotrophic Bacteria • organism that makes organic compounds from inorganic sources • synthesize organic compounds from carbon dioxide and other inorganic elements (CO2, H2S) or molecules • using either light energy or chemical energy. ...
Biotechnology Notes - Mrs. Kievit Science
... › The use of a patient’s ______ to select treatment that is suited to a patient’s individual genes › The goal is to develop medicine unique to an individual. Biotechnology in Microbiology Microbiology › Field of science that studies ____________________ Microbes can work for and against humans › ...
... › The use of a patient’s ______ to select treatment that is suited to a patient’s individual genes › The goal is to develop medicine unique to an individual. Biotechnology in Microbiology Microbiology › Field of science that studies ____________________ Microbes can work for and against humans › ...
幻灯片 1
... bactera are staphylococcus and streptococcus. Gram-negative bacteria include E. coli and Klebsiella. ...
... bactera are staphylococcus and streptococcus. Gram-negative bacteria include E. coli and Klebsiella. ...
The Microbial World and You
... seeing many emerging infectious diseases such as bovine spongiform encephalopathy (mad cow disease, caused by an infectious protein called a prion), outbreaks of E. coli O157: H7 infections, Ebola hemorrhagic fever, Hantavirus, and, of course, AIDS. The study of the body’s resistance to microbial in ...
... seeing many emerging infectious diseases such as bovine spongiform encephalopathy (mad cow disease, caused by an infectious protein called a prion), outbreaks of E. coli O157: H7 infections, Ebola hemorrhagic fever, Hantavirus, and, of course, AIDS. The study of the body’s resistance to microbial in ...
Mycoplasmas
... two genera); Acholeplasmataceae (need not external cholesterol during growth); Spiroplasmataceae (can form spiral structure) ...
... two genera); Acholeplasmataceae (need not external cholesterol during growth); Spiroplasmataceae (can form spiral structure) ...
For Educational Use Only
... When one or more of these natural defenses are compromised, bacteria overgrowth in the small intestine may result; this overgrowth is difficult to correct. The bacteria bind to the lining of the small intestine and mount their own defense mechanism, preventing the body from removing it. Figure 3: Th ...
... When one or more of these natural defenses are compromised, bacteria overgrowth in the small intestine may result; this overgrowth is difficult to correct. The bacteria bind to the lining of the small intestine and mount their own defense mechanism, preventing the body from removing it. Figure 3: Th ...
Microbes Pupil Task File
... for the guests. Everybody was very hungry and so Chloe’s dad cooked the burgers quickly. They were burnt on the outside. After a couple of mouthfuls, a few guests complained that their burgers were cold in the middle, so Chloe’s dad put them back on the barbeque to heat them through. A few hours lat ...
... for the guests. Everybody was very hungry and so Chloe’s dad cooked the burgers quickly. They were burnt on the outside. After a couple of mouthfuls, a few guests complained that their burgers were cold in the middle, so Chloe’s dad put them back on the barbeque to heat them through. A few hours lat ...
General Biology 101
... as well such as sulfur derived materials. Photoheterotrophs – capture sunlight but get carbon from sources other than CO2 e.g. carbohydrates to address their ingredient needs to make new compounds. Chemoheterotrophs – prokaryotic cells that are not self-feeding. May be parasitic, or saprobic i.e. di ...
... as well such as sulfur derived materials. Photoheterotrophs – capture sunlight but get carbon from sources other than CO2 e.g. carbohydrates to address their ingredient needs to make new compounds. Chemoheterotrophs – prokaryotic cells that are not self-feeding. May be parasitic, or saprobic i.e. di ...
Bacteria and Viruses
... Live in habitats based on their biochemical abilities Obligate anaerobes: ? Facultative anaerobes:? Obligate aerobes:? Prokaryotes have various temperature requirements for growth Most bacterial species grow best at a pH of 6.5 to 7.5 ...
... Live in habitats based on their biochemical abilities Obligate anaerobes: ? Facultative anaerobes:? Obligate aerobes:? Prokaryotes have various temperature requirements for growth Most bacterial species grow best at a pH of 6.5 to 7.5 ...
Introductory slides - first couple of lectures
... Place the cell into a cubic swimming pool 1 cm on each side, then expand the entire system so that the cell is now 2 m long (equivalent to a tall [6’6”] human): Swimming pool is just over 6 miles on a side!! ...
... Place the cell into a cubic swimming pool 1 cm on each side, then expand the entire system so that the cell is now 2 m long (equivalent to a tall [6’6”] human): Swimming pool is just over 6 miles on a side!! ...
Morphology and structure of bacteria
... • Resistance to heat and chemicals! • They cannot be easily achieved by boiling • Other methods of sterilisation like autoclaving should be used • So for ex. Bacillus stearothermophilus is used for evaluation of the sterilisation efficacy of autoclaves! ...
... • Resistance to heat and chemicals! • They cannot be easily achieved by boiling • Other methods of sterilisation like autoclaving should be used • So for ex. Bacillus stearothermophilus is used for evaluation of the sterilisation efficacy of autoclaves! ...
The Lyme Bacterium (Borrelia burgdorferi)
... scientific study found an average of 2,735 bacteria/tick 15 days after the tick had fed. Although the scientists found that recently molted nymphs had only 300 bacteria/nymph, within 75 days, these nymphs had an average of 61,275 bacteria! The tick serves as the vector for the bacteria, moving it fr ...
... scientific study found an average of 2,735 bacteria/tick 15 days after the tick had fed. Although the scientists found that recently molted nymphs had only 300 bacteria/nymph, within 75 days, these nymphs had an average of 61,275 bacteria! The tick serves as the vector for the bacteria, moving it fr ...
Sterilization & Disinfection
... 4. List several methods used to inhibit the growth of microorganisms 5. Identify several factors that can influence the effectiveness of disinfectants ...
... 4. List several methods used to inhibit the growth of microorganisms 5. Identify several factors that can influence the effectiveness of disinfectants ...
Bacteria are the smallest and simplest cells "You know when people
... different. Yet all differentiated cell types are generated during embryonic development from a single fertilizied egg cell. We share the same molecular mechanisms! ...
... different. Yet all differentiated cell types are generated during embryonic development from a single fertilizied egg cell. We share the same molecular mechanisms! ...
Slide - Smith Lab
... made up mainly of mucin , coating the cornea with a hydrophilic layer which allows for even distribution of the tear film. Few commensal organisms – although DNA of many bacteria and bacteriophages can be found using PCR amplification. Staphylococcus epidermidis, Propionibacterium acnes, and other s ...
... made up mainly of mucin , coating the cornea with a hydrophilic layer which allows for even distribution of the tear film. Few commensal organisms – although DNA of many bacteria and bacteriophages can be found using PCR amplification. Staphylococcus epidermidis, Propionibacterium acnes, and other s ...
Chapter 1: Microbiology
... • There are over 10 million species of prokaryotes that appear in spherical, spiral, or rod-shaped forms • There are two domains of prokaryotes, Bacteria and Archaea The Spectrum of Microorganisms Is Diverse (cont.) • There are over 3600 known viruses • Viruses are not actually microbes and are not ...
... • There are over 10 million species of prokaryotes that appear in spherical, spiral, or rod-shaped forms • There are two domains of prokaryotes, Bacteria and Archaea The Spectrum of Microorganisms Is Diverse (cont.) • There are over 3600 known viruses • Viruses are not actually microbes and are not ...
Chapter 9 - Genetics of Bacteria
... c. An F+ strain transfers an F factor to an F- strain during conjugation d. Bacteria may contain different types of plasmids 3. Conjugation and mapping via HFR strains a. Hfr strains contain an F factor integrated into the bacterial chromosome b. Hfr strains can transfer a portion of the bacterial c ...
... c. An F+ strain transfers an F factor to an F- strain during conjugation d. Bacteria may contain different types of plasmids 3. Conjugation and mapping via HFR strains a. Hfr strains contain an F factor integrated into the bacterial chromosome b. Hfr strains can transfer a portion of the bacterial c ...
Human microbiota
The human microbiota is the aggregate of microorganisms, a microbiome that resides on the surface and in deep layers of skin (including in mammary glands), in the saliva and oral mucosa, in the conjunctiva, and in the gastrointestinal tracts. They include bacteria, fungi, and archaea. Micro-animals which live on the human body are excluded. The human microbiome refer to their genomes.One study indicated they outnumber human cells 10 to 1. Some of these organisms perform tasks that are useful for the human host. However, the majority have been too poorly researched for us to understand the role they play, however communities of microflora have been shown to change their behavior in diseased individuals. Those that are expected to be present, and that under normal circumstances do not cause disease, but instead participate in maintaining health, are deemed members of the normal flora. Though widely known as microflora, this is a misnomer in technical terms, since the word root flora pertains to plants, and biota refers to the total collection of organisms in a particular ecosystem. Recently, the more appropriate term microbiota is applied, though its use has not eclipsed the entrenched use and recognition of flora with regard to bacteria and other microorganisms. Both terms are being used in different literature.Studies in 2009 questioned whether the decline in biota (including microfauna) as a result of human intervention might impede human health.Most of the microbes associated with humans appear to be not harmful at all, but rather assist in maintaining processes necessary for a healthy body. A surprising finding was that at specific sites on the body, a different set of microbes may perform the same function for different people. For example, on the tongues of two people, two entirely different sets of organisms will break down sugars in the same way. This suggests that medical science may be forced to abandon the ""one only"" microbe model of infectious disease, and rather pay attention to functions of groups of microbes that have somehow gone awry.