lecture3-host
... Virulence is measured by the Lethal dose 50 (LD50) which is the number of organisms or mg. of toxins that will kill 50% of susceptible lab. animal – usually mice – when injected into such animal. When the LD 50 is small, the microorganism is considered highly virulent and when it is high the organis ...
... Virulence is measured by the Lethal dose 50 (LD50) which is the number of organisms or mg. of toxins that will kill 50% of susceptible lab. animal – usually mice – when injected into such animal. When the LD 50 is small, the microorganism is considered highly virulent and when it is high the organis ...
Dog`s Drool: Is It Cool? Dog Saliva vs. Neosporin in Killing Bacteria
... Petri dishes, agar, latex gloves, sterile cotton swabs, sterile distilled water, human saliva, dog saliva, and Neosporin were gathered. One petri dish was used as a negative control and contained no bacteria to show the agar was not contaminated. One petri dish was used as a positive control which o ...
... Petri dishes, agar, latex gloves, sterile cotton swabs, sterile distilled water, human saliva, dog saliva, and Neosporin were gathered. One petri dish was used as a negative control and contained no bacteria to show the agar was not contaminated. One petri dish was used as a positive control which o ...
Bacteria - Lake Travis ISD
... increase in the number of cyanobacteria due to a high availability of nutrients. ...
... increase in the number of cyanobacteria due to a high availability of nutrients. ...
Genetics and Evolution IB 201 06
... 1. Vertical transmission of disease from parent to offspring (e.g., nematode worms that parasitize fig wasps) should evolve lower levels of virulence 2. Horizontal transmission can result in higher levels ov virulence Degree of virulence also depends on population density of host 1. High density hos ...
... 1. Vertical transmission of disease from parent to offspring (e.g., nematode worms that parasitize fig wasps) should evolve lower levels of virulence 2. Horizontal transmission can result in higher levels ov virulence Degree of virulence also depends on population density of host 1. High density hos ...
Bacteria Webquest - Nutley Public Schools
... Please visit the following website: http://www.ucmp.berkeley.edu/bacteria/bacterialh.html 12. What are pathogenic bacteria? 13. What do aerobic bacteria require? 14. Where do anaerobic bacteria live and what can they cause? 15. How do facultative anaerobic bacteria differ from the other two? 16. Wha ...
... Please visit the following website: http://www.ucmp.berkeley.edu/bacteria/bacterialh.html 12. What are pathogenic bacteria? 13. What do aerobic bacteria require? 14. Where do anaerobic bacteria live and what can they cause? 15. How do facultative anaerobic bacteria differ from the other two? 16. Wha ...
Chapter 23 Bacteria Prokaryotes are single celled organisms that do
... Bacteria and other organisms that cause disease are called pathogens. Some bacteria cause disease by making certain poisons called toxins. o Exotoxins - Toxic substances that bacteria secrete into their environment. Example: Tetanus is caused by the bacteria Clostridium tetani o Endotoxins- Toxic su ...
... Bacteria and other organisms that cause disease are called pathogens. Some bacteria cause disease by making certain poisons called toxins. o Exotoxins - Toxic substances that bacteria secrete into their environment. Example: Tetanus is caused by the bacteria Clostridium tetani o Endotoxins- Toxic su ...
Microbial Mechanisms of Pathogenicity (Chapter 15) Lecture
... -most common route for most pathogens -entry through mucus membranes: 1. respiratory tract (most common) 2. gastrointestinal tract 3. urinary/genital tracts 4. conjunctiva B. Skin (keratinized cutaneous membrane) -some pathogens infect hair follicles and sweat glands -few can colonize surface -unles ...
... -most common route for most pathogens -entry through mucus membranes: 1. respiratory tract (most common) 2. gastrointestinal tract 3. urinary/genital tracts 4. conjunctiva B. Skin (keratinized cutaneous membrane) -some pathogens infect hair follicles and sweat glands -few can colonize surface -unles ...
OldExam 1
... A. Their proteins are relatively stable at high temperatures. B. They have lipids in their membranes. C. Their proteins are relatively unstable at high temperatures. D. Their genomes are made of DNA. E. They often cannot grow at low temperatures. -----------5. If a strain of bacteria requires 20 hou ...
... A. Their proteins are relatively stable at high temperatures. B. They have lipids in their membranes. C. Their proteins are relatively unstable at high temperatures. D. Their genomes are made of DNA. E. They often cannot grow at low temperatures. -----------5. If a strain of bacteria requires 20 hou ...
Bacteria , Viruses, Protists , and Prions
... Archaebacteria do not. • DNA sequences of archaebacteria is more similar to that of eukaryotes than to the DNA of eubacteria • Archaebacteria often live in very extreme ...
... Archaebacteria do not. • DNA sequences of archaebacteria is more similar to that of eukaryotes than to the DNA of eubacteria • Archaebacteria often live in very extreme ...
Bacteria, Viruses, Protists, and Prions
... Archaebacteria do not. • DNA sequences of archaebacteria is more similar to that of eukaryotes than to the DNA of eubacteria • Archaebacteria often live in very extreme ...
... Archaebacteria do not. • DNA sequences of archaebacteria is more similar to that of eukaryotes than to the DNA of eubacteria • Archaebacteria often live in very extreme ...
Micro-Ch10-13_B.pdf
... 39) Fission yeast differ from budding yeast in that A) fission yeast produce zygospores B) one lacks chitin in the cell wall C) the cells of fission yeast divide evenly where budding yeast divide unevenly D) fission yeasts are prokaryotic where budding yeast are eukaryotic 40) Rhizopus (black bread ...
... 39) Fission yeast differ from budding yeast in that A) fission yeast produce zygospores B) one lacks chitin in the cell wall C) the cells of fission yeast divide evenly where budding yeast divide unevenly D) fission yeasts are prokaryotic where budding yeast are eukaryotic 40) Rhizopus (black bread ...
Integumentary system
... • Consists of areolar and adipose tissue • Not really part of the integumentary system • Target site for subcutaneous injection ...
... • Consists of areolar and adipose tissue • Not really part of the integumentary system • Target site for subcutaneous injection ...
Chapter 25 - Fort Bend ISD
... illness salmonellosis , Vibrio(motile gram negative curvedrod shaped bacterium with a polar flagellum that causes cholera in humans.) , Helicobacter(stomach ulcers), and many other notable genera.[1] Others are free-living, and include many of the bacteria responsible for nitrogen fixation. The grou ...
... illness salmonellosis , Vibrio(motile gram negative curvedrod shaped bacterium with a polar flagellum that causes cholera in humans.) , Helicobacter(stomach ulcers), and many other notable genera.[1] Others are free-living, and include many of the bacteria responsible for nitrogen fixation. The grou ...
Chapter 4
... obtained to grow and identify the suspect organism. A portion of the specimen is placed into a tube of nutrient broth and/or streaked across the surface of a Petri dish containing nutrients and agar. Agar plates (Figure 4.13) allow the growth of bacterial colonies with identifiable morphology (Figur ...
... obtained to grow and identify the suspect organism. A portion of the specimen is placed into a tube of nutrient broth and/or streaked across the surface of a Petri dish containing nutrients and agar. Agar plates (Figure 4.13) allow the growth of bacterial colonies with identifiable morphology (Figur ...
Studies on Sulphate reducing bacteria from Southeast coast of India
... A striking feature in mangroves ecosystem is a large anaerobic substratum enriched with anaerobic microorganisms predominantly sulphate reducing bacteria. However, research studies on the role of sulphate reducing bacteria in the functioning of mangrove ecosystem are only scanty. Therefore the prese ...
... A striking feature in mangroves ecosystem is a large anaerobic substratum enriched with anaerobic microorganisms predominantly sulphate reducing bacteria. However, research studies on the role of sulphate reducing bacteria in the functioning of mangrove ecosystem are only scanty. Therefore the prese ...
VIRUS Notes
... temporary bridge forms between two cells. A plasmid, a separate section of DNA, is transferred from one cell to the other. Often the plasmid contains useful genes, like antibiotic resistance. ...
... temporary bridge forms between two cells. A plasmid, a separate section of DNA, is transferred from one cell to the other. Often the plasmid contains useful genes, like antibiotic resistance. ...
3.1 Bacteria and viruses flashcards
... 77) What is an example of vector transmission? 78) What is an organism that causes disease? 79) The type of pathogen that only causes disease when they have an opportunity? 80) What are some STD viruses? 81) What is the virus that infects white blood cells? 82) What are some diseases that are the ex ...
... 77) What is an example of vector transmission? 78) What is an organism that causes disease? 79) The type of pathogen that only causes disease when they have an opportunity? 80) What are some STD viruses? 81) What is the virus that infects white blood cells? 82) What are some diseases that are the ex ...
Answer all the questions (100) on scantron cards. Please return
... a. Also called “Valley fever” b. A bacterial infection of the lung c. (a) & (b) d. NONE of the Above 85. All of the following are infections of the lower respiratory system, except a. Hantavirus pulmonary syndrome b. Whooping cough c. Streptococcal pharyngitis d. Mycoplasmal pneumonia 86. Which of t ...
... a. Also called “Valley fever” b. A bacterial infection of the lung c. (a) & (b) d. NONE of the Above 85. All of the following are infections of the lower respiratory system, except a. Hantavirus pulmonary syndrome b. Whooping cough c. Streptococcal pharyngitis d. Mycoplasmal pneumonia 86. Which of t ...
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.