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Found Pathogen 47 times.

Displaying results 1 to 10.

1. Activated sludge process
A method of treating sewage and wastewater through microbial oxidation. Sewage previously treated in settling tanks is aerated to encourage the growth of nonpathogenic aerobic microorganisms ( bacteria , yeast s, molds and protozoans) which break the organic matter down into carbon dioxide, water, and simple salts. After this activated sludge is produced, the wastewater undergoes further processing through anaerobic digestion, filtering, and chlorination.

2. Aggressin
A term for a protein produced by a pathogenic microbe which aids its spread in the host by inhibiting the host's immune system (specifically the response by phagocyte s).

3. Antigenic switching
The process by which a pathogenic microbe's genetic structure is altered to change its surface antigen s in order to avoid being detected by the host 's immune system.

4. Antigenic variation
A change in the structure of an antigen on the surface of a disease-causing microorganism or virus (a pathogen ) so that the host's immune system no longer recognizes the pathogen and must make new antibodies to recognize the changed antigens before the host can continue to combat the disease. As a result, the host cannot stay immune to the disease.

5. Antiseptic
* A compound that prevents infection or decay by killing a wide range of pathogenic microbes. * The condition of being free of pathogenic microbes.

6. Aspergillus
Aspergillus is a genus of filamentous fungi belonging to Deuteromycetes. Fungi in this genus are easy to grow; some produce a wide range of useful enzyme s, but others are dangerous pests and pathogens. For instance, A. niger is used to produce citric acid , gluconic acid, amylase , protease s, and peptic enzymes, but A. parasiticus grows on grains and produces aflatoxin , a powerful liver carcinogen.

7. Attenuation
* A decrease in the ability of a pathogen (like a virus or disease-causing bacteria ) to cause disease. * The ability of a bacterium to regulate the amount of an amino acid it makes based on how much is already present, whereby excess amounts of the amino acid will turn off synthesis of itself.

8. Bacillus subtilis
B. subtilis is a Gram-positive , rod-shaped, nonpathogenic bacterium which lives in soil. Its genome has been widely studied and is frequently used in genetic engineering and microbiology experiments.

9. Beta thalassemia
This form of thalassemia is due to point mutation s, further subdivided according to pathogenesis: * beta thalassemia major: in this form of beta thalassemia, patients are homozygous for the defective genes: beta0, homozygous beta+, both are life-threatening. * beta thalassemia minor: patients are heterozygous for the defective gene; they have a mild anemia .

10. Biological warfare
The military use of harmful biological agents such as pathogen ic bacteria .

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