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A pathogen (from Greek πάθος pathos "suffering, passion", and γἰγνομαι (γεν-) gignomai (gen-) "I give birth to"), infectious agent, or more commonly germ, is a biological agent that causes disease or illness to its host. The term pathogen is derived from the Greek "that which produces suffering." There are several substrates and pathways whereby pathogens can invade a host; the principal pathways have different episodic time frames, but soil contamination has the longest or most persistent potential for harboring a pathogen.

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Wikipedia about pathogen

A pathogen (from Greek πάθος pathos "suffering, passion", and γἰγνομαι (γεν-) gignomai (gen-) "I give birth to"), infectious agent, or more commonly germ, is a biological agent that causes disease or illness to its host. The term pathogen is derived from the Greek "that which produces suffering." There are several substrates and pathways whereby pathogens can invade a host; the principal pathways have different episodic time frames, but soil contamination has the longest or most persistent potential for harboring a pathogen.

The body contains many natural defenses against some of the common pathogens (such as Pneumocystis) in the form of the human immune system and by some "helpful" bacteria present in the human body's normal flora. However, if the immune system or "good" bacteria is damaged in any way (such as by chemotherapy, human immunodeficiency virus (HIV), or antibiotics being taken to kill other pathogens), pathogenic bacteria that were being held at bay can proliferate and cause harm to the host. Such cases are called opportunistic infections.

Some pathogens (such as the bacterium Yersinia pestis, which may have caused the Black Plague, the Variola virus, and the Malaria protozoa) have been responsible for massive numbers of casualties and have had numerous effects on afflicted groups. Of particular note in modern times is HIV, which is known to have infected several million humans globally, along with Severe Acute Respiratory Syndrome (SARS) and the Influenza virus. Today, while many medical advances have been made to safeguard against infection by pathogens, through the use of vaccination, antibiotics, and fungicide, pathogens continue to threaten human life. Social advances such as food safety, hygiene, and water treatment have reduced the threat from some pathogens.

Not all pathogens are bad. In entomology, pathogens are one of the "Three P's" (Predators, Pathogens, and Parasitoids) that serve as natural or introduced biological controls to suppress arthropod pest populations.

Types of pathogens

Below is a list of different types of notable pathogens as categorized by their structural characteristics, and some of their known and predicted effects on infected host.

Pathogenic bacteria

Main: Pathogenic bacteria Although the vast majority of bacteria are harmless or beneficial, a few pathogenic bacteria cause infectious diseases. The most common bacterial disease is tuberculosis, caused by the bacterium Mycobacterium tuberculosis, which kills about 2 million people a year, mostly in sub-Saharan Africa. Pathogenic bacteria contribute to other globally important diseases, such as pneumonia, which can be caused by bacteria such as Streptococcus and Pseudomonas, and foodborne illnesses, which can be caused by bacteria such as Shigella, Campylobacter and Salmonella. Pathogenic bacteria also cause infections such as tetanus, typhoid fever, diphtheria, syphilis and leprosy. Bacteria can often be killed by antibiotics.

Search results for Pathogen

Plant pathology - Wikipedia, the free encyclopedia

Plant pathology. From Wikipedia, the free encyclopedia (Redirected from Plant pathogen) ... Rothamsted Plant Pathogen Interactions Department. Grape Virology ...en.wikipedia.org/wiki/Plant_pathogen

PGGP - P. gingivalis as the Pathogen

This project is collaborated between The Forsyth Institute (TFI) and The ... Porphyromonas gingivalis the pathogen. Periodontal Diseases. Periondontal Pathogens ...www.pgingivalis.org/pathogen.htm

pathogen

Categories: oomycete · plant pathogen · rusts ... Categories: cryptococcus · human pathogen · phylogenetics · phylogeny · speciation ...fungalgenomes.org/blog/tag/pathogen/

Scientific Divisions

Pathogen Genomics: ... Linking pathogen genomes to the tropics - promoting the use of genomic sequence ... Pathogen Sequencing - Julian Parkhill: ...www.sanger.ac.uk/pathogens/

Pathogen Detection Systems | Fully automated, on-site, in-line systems ...

Pathogen Detection Systems – Microbiology anytime, anywhere; Automated solutions for on-site water testing ... Pathogen Detection Systems, Inc. Suite 1619, ...pathogendetect.com/

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News about Pathogen

What HIV needs: Identification of human factors may yield novel therapeutic targets for HIV

PhysOrgThe Salk Institute for Biological Studies and Burnham Institute for Medical Research today announced 295 host cell factors that are involved in human immunodeficiency virus (HIV) infection. The study, published in the Oct. 3 issue of Cell, could lead to the development of a new class of HIV therapeutics aimed at disrupting the human-HIV interactions that lead to viral infection.http://www.physorg.com/news142171159.html

Pesky pathogen can't derail Happe

St. Charles JournalAn athlete's ability to pull through when he or she isn't at the top of their game is what separates ordinary ones from the elite. It's especially true in cross country, a sport that pushes the endurance of the human body to its absolute limit.http://stcharlesjournal.stltoday.com/articles/2008/09/30/spo...

Gov. cuts state funding for beach health monitoring

The Malibu TimesThe move could harm efforts at keeping local beaches safe. Malibu says its water quality testing will not be affected.http://www.malibutimes.com/articles/2008/10/02/news/news4.tx...

HIV Outbreak Began Decades Earlier Than Thought

Health ScoutRise of cities, risky behavior in west central Africa between 1884 and 1924 at root, study says.http://www.healthscout.com/news/1/619877/main.html

Bacterial leaf blight on rice in Bangladesh

SeedQuestAman paddy [rice] fields in 5 northern districts have been affected by massive pest attack. Agriculture officials apprehend that the production may fall short of the target by around 5 lakh [500 000] tonnes in the 5 northern districts.http://www.seedquest.com/News/releases/2008/october/23911.ht...

News about Pathogen

Avure Technologies Announces Substantial Growth

Forbes ... in the design, manufacturing, installation, and global support of high pressure presses for densification of advanced materials and critical industrial parts, forming of sheet metal components, and high pressure pasteurization to keep food pathogen ... http://www.forbes.com/prnewswire/feeds/prnewswire/2008/09/10...

Phase I trial for new tuberculosis vaccine

News-Medical.NetThe most important tuberculosis pathogen, the bacterium Mycobakterium tuberculosis, divides itself every 16 to 20 hours. In comparison to other bacteria, which divide themselves in the space of minutes, this is extremely slow.http://www.news-medical.net/?id=41413

Blood Lines

Jewish ExponentHe stresses that the company is the first pathogen inactivation system approved in Europe to treat platelets for transfusions. The same technology is applicable to therapeutic plasma for transfusion.http://www.jewishexponent.com/article/17077/

Conference highlights produce safety

Monterey County HeraldAt the time of the outbreak, the company already had formed a panel of volunteer scientific advisers to further the understanding of contamination by the pathogen Escherichia coli O157:http://www.montereyherald.com/business/ci_10435314

Bees in the wall? Make a call

Baltimore SunThis is a bacterial pathogen strongly associated with alkaline soil (high pH) and raw, un-decomposed organic matter, such as fresh animal manure.http://www.baltimoresun.com/features/custom/homegarden/bal-t...

Search results for Pathogen

pathogen: Definition from Answers.com

pathogen n. An agent that causes disease, especially a living microorganism such as a bacterium orhttp://www.answers.com/topic/pathogen

pathogen - definition of pathogen by the Free Online Dictionary ...

An agent that causes disease, especially a living microorganism such as a bacterium or fungus.http://www.thefreedictionary.com/pathogen

Pathogens - definition of Pathogens by the Free Online Dictionary ...

An agent that causes disease, especially a living microorganism such as a bacterium or fungus.http://www.thefreedictionary.com/Pathogens

Pathogen Ink

Pathogen Ink Action Photography--out of the studio and onto the field. Specializing in all kinds of sports and action photography. Professional equipment capturing shots of ... http://www.pathogenink.ifp3.com/

Pathogen Games | Online Game Network

Join us in the Open beta of Pathogen Games! What is Pathogen Games? PathogenGames.com is the new hub, or portal for several web based games. How much does it cost to play?http://pathogengames.com
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TGTV.026 Emily Hagins Q&A Pathogen

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Bloodborne Pathogens Training Video

Bloodborne Pathogens Training VideoMeets OSHA requirements for training employees on the bloodborne pathogens standard! For more information, visit http://hcmarketplace.com/prod-3470-EUTUBE.htmlFlash - Video

Pathogen Trailer

Pathogen TrailerIn this psychological thriller, a desperate mother tries to protect her daughter from a dark bitter past. But when a determined husband joins in their daughter’s struggl...Flash - Video

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Pahogen's Garage - IntroIntro vid. Clips of P600B/D1SC ProCharged Firebird... and 130,000mile beater (backup) Firebird. Enjoy!Flash - Video

Children Of Bodom (with Pathogen) L...

Children Of Bodom (with Pathogen) Live Sydney 2005 (14 mins)AVERAGE QUALITY AUDIO. Australia's Pathogen and Finland's Children Of Bodom (including part of 'Lake Bodom') playing at their second sold out show in Sydney, 2005. Video care of...Flash - Video

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This is the trailer for the new DVD Coming from Tritin Multi....This is the trailer for the new DVD Coming from Tritin Multimedia and Pathogen Productions, Up2NoGood - The World is Our PlayGround. If you liked Mischief, Adrenaline Crew, Getaway in Stockholm, then ...wmv: 0 MB w:0px - h:0px

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Answers for Pathogen

Lena

Is a pathogen just the name of harmful microorganisms? Why don't we just say microorganisms?

Lena
lfcpana

i need to research a pathogen in Australia that effects shoots of a plant and identify its symptoms.any ideas?

lfcpanaPhytopathology lists http://www.google.com/Top/Science/Biology/Botany/Plant_Pathology/Research_Groups/ Phytophthora cinnamomi was introduced to Australia causing major losses to native plant popul...
Max B

Which of these factors will NOT affect the measured ID50 of a pathogen?

Max BC. the portal through which the microbe enters the host
bluevoltagex@sbcglobal.net

What is the most horrible pathogen you can think of? What are their effects?

bluevoltagex@sbcglobal.nethttp://en.wikipedia.org/wiki/Necrotizing_fasciitis flesh eating strep.
C K

What is the pathogen that causes the disease Malaria?

C KYes. The malaria pathogen is a microscopically small, single-celled parasite named “plasmodium". Mosquitos spread the protozoan Plasmodium vivax that causes malaria. Added, source below :...

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