Coordinates | 43°19′54″N45°38′41″N |
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{{infobox disease | name | Diphtheria | Image Diphtheria bull neck.5325 lores.jpg | Caption Diphtheria causes a characteristic swollen neck, sometimes referred to as “bull neck”. | Width 150 | DiseasesDB 3122 | ICD10 | ICD9 | ICDO | OMIM | MedlinePlus 001608 | eMedicineSubj emerg | eMedicineTopic 138 | eMedicine_mult | MeshID D004165 }} |
Diphtheria (Greek διφθέρα (''diphthera'') "pair of leather scrolls") is an upper respiratory tract illness caused by ''Corynebacterium diphtheriae'', a facultative anaerobic Gram-positive bacterium. It is characterized by sore throat, low fever, and an adherent membrane (a ''pseudomembrane'') on the tonsils, pharynx, and/or nasal cavity. A milder form of diphtheria can be restricted to the skin. Less common consequences include myocarditis (about 20% of cases) and peripheral neuropathy (about 10% of cases).
Diphtheria is a contagious disease spread by direct physical contact or breathing the aerosolized secretions of infected individuals. Historically quite common, diphtheria has largely been eradicated in industrialized nations through widespread vaccination. In the United States for example, there were 52 reported cases of diphtheria between 1980 and 2000; between 2000 and 2007 there were only three cases as the DPT (''Diphtheria–Pertussis–Tetanus'') vaccine is recommended for all school-age children. Boosters of the vaccine are recommended for adults since the benefits of the vaccine decrease with age without constant re-exposure; they are particularly recommended for those traveling to areas where the disease has not been eradicated.
Diphtheria toxin is a single protein composed of two fragments: one that allows entry into host cells and another that prevents the host cell from making proteins. The toxin binds to a cell-surface receptor to gain entry into the cell. Once inside the cell, the protein prevents the cell from making new proteins.
As mentioned, diphtheria toxin is composed of two components—fragment A and fragment B—held together by a disulfide bond. Fragment B is a recognition subunit that gains the toxin entry into the host cell by binding to a receptor on its plasma membrane (specifically, it binds to the EGF-like domain of heparin-binding EGF-like growth factor, or HB-EGF). This signals the cell to internalize the toxin within an endosome via receptor-mediated endocytosis. Inside the endosome, the toxin is split by a trypsin-like protease into its individual A and B fragments. The acidity of the endosome causes fragment B to create pores in the endosome membrane, thereby catalyzing the release fragment A into the cell's cytoplasm.
Fragment A inhibits the synthesis of new proteins in the affected cell. It does this by catalyzing ADP-ribosylation of elongation factor EF-2—a protein that is essential to the translation step of protein synthesis. Specifically, this ADP-ribosylation involves the transfer of an ADP-ribose from NAD+ to a diphthamide (a modified histidine) residue within the EF-2 protein. Since EF-2 is needed for the moving of tRNA from the A-site to the P-site of the ribosome during protein translation, ADP-ribosylation of EF-2 inhibits protein synthesis.
ADP-ribosylation of EF-2 is reversed by giving high doses of nicotinamide (a form of vitamin B3), since this is one of the reaction's end-products and high amounts will drive the reaction in the opposite direction.
Diphtheria toxin is produced by ''C. diphtheriae'' only when it is infected with a bacteriophage that integrates the toxin-encoding genetic elements into the bacteria.
Empirical treatment should generally be started in a patient in whom suspicion of diphtheria is high.
Antibiotics have not been demonstrated to affect healing of local infection in diphtheria patients treated with antitoxin. Antibiotics are used in patients or carriers to eradicate ''C. diphtheriae'' and prevent its transmission to others. The CDC recommends either:
In cases that progress beyond a throat infection, diphtheria toxin spreads through the bloodstream and can lead to potentially life-threatening complications that affect other organs of the body, such as the heart and kidneys. The toxin can cause damage to the heart that affects its ability to pump blood or the kidneys' ability to clear wastes. It can also cause nerve damage, eventually leading to paralysis. 40% to 50% of those left untreated can die.
Diphtheria is a serious disease, with fatality rates between 5% and 10%. In children under 5 years and adults over 40 years, the fatality rate may be as much as 20%. Outbreaks, though very rare, still occur worldwide, even in developed nations such as Germany and Canada. After the breakup of the former Soviet Union in the late 1980s, vaccination rates in its constituent countries fell so low that there was an explosion of diphtheria cases. In 1991 there were 2,000 cases of diphtheria in the USSR. By 1998, according to Red Cross estimates, there were as many as 200,000 cases in the Commonwealth of Independent States, with 5,000 deaths. This was so great an increase that diphtheria was cited in the Guinness Book of World Records as "most resurgent disease".
In the 1920s there were an estimated 100,000 to 200,000 cases of diphtheria per year in the United States, causing 13,000 to 15,000 deaths per year. Children represented a large majority of these cases and fatalities. One of the most famous outbreaks of diphtheria was in Nome, Alaska; the "Great Race of Mercy" to deliver diphtheria antitoxin is now celebrated by the Iditarod Trail Sled Dog Race.
One of the first effective treatments for diphtheria was discovered in the 1880s by U.S. physician Joseph O'Dwyer (1841–1898). O'Dwyer developed tubes that were inserted into the throat, and prevented victims from suffocating due to the membrane sheath that grows over and obstructs airways. In 1884 Friedrich Loeffler discovered the causative organism (''Corynebacterium diphtheriae''). In the 1890s, the German physician Emil von Behring developed an antitoxin that did not kill the bacterium, but neutralized the toxic poisons that the bacterium releases into the body. Von Behring discovered that animal blood has antitoxins in it and so he took the blood, removed the clotting agents and injected it into human patients. Von Behring was awarded the first Nobel Prize in Medicine for his role in the discovery, and development of a serum therapy for diphtheria. (Americans William H. Park and Anna Wessels Williams; and Pasteur Institute scientists Emile Roux and Auguste Chaillou also independently developed diphtheria antitoxin in the 1890s.) The first successful vaccine for diphtheria was developed in 1913 by Behring. However, antibiotics against diphtheria were not available until the discovery and development of sulfa drugs.
The Schick test, invented between 1910 and 1911, is a test used to determine whether or not a person is susceptible to diphtheria. It was named after its inventor, Béla Schick (1877–1967), a Hungarian-born American pediatrician. A massive five-year campaign was coordinated by Dr. Schick. As a part of the campaign, 85 million pieces of literature were distributed by the Metropolitan Life Insurance Company with an appeal to parents to "Save your child from diphtheria." A vaccine was developed in the next decade, and deaths began declining in earnest in 1924.
In early May 2010, a case of diphtheria was diagnosed in Port-au-Prince, Haiti after the devastating 2010 Haiti earthquake. The 15 year old male patient died while workers searched for anti-toxin.
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Coordinates | 43°19′54″N45°38′41″N |
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birth date | August 17, 1960 |
birth place | Santa Monica, California, U.S. |
birth name | Sean Justin Penn |
occupation | Actor, screenwriter, director, producer |
years active | 1974–present |
spouse | Madonna (1985–1989)Robin Wright (1996–2010) |
parents | Leo Penn (deceased)Eileen Ryan |
relatives | Aimee Mann (sister-in-law) }} |
Penn began his acting career in television with a brief appearance in a 1974 episode of ''Little House on the Prairie'', directed by his father Leo Penn. Following his film debut in 1981's ''Taps'' and a diverse range of film roles in the 1980s, Penn emerged as a prominent leading actor with the 1995 drama film ''Dead Man Walking'', for which he earned his first Academy Award nomination and the Best Actor Award at the Berlin Film Festival. Penn subsequently received another two Oscar nominations for ''Sweet and Lowdown'' (1999) and ''I Am Sam'' (2001), before winning his first Academy Award for Best Actor in 2003 for ''Mystic River'' and a second one in 2008 for ''Milk''. He has also won a Best Actor Award of the Cannes Film Festival for ''She's So Lovely'' (1997), and two Best Actor Awards at the Venice Film Festival for ''Hurlyburly'' (1998) and ''21 Grams'' (2003).
Penn made his feature film directorial debut with 1991's ''The Indian Runner'', followed by the drama film ''The Crossing Guard'' (1995) and the mystery film ''The Pledge'' (2001). In 2002, Penn directed one of the 11 segments of ''11'09"01 September 11'', a compilation film made in response to the September 11 attacks. In 2007, Penn directed his fourth feature film ''Into the Wild'', which garnered critical acclaim and two Academy Award nominations.
In addition to his film work, Penn is known for his political and social activism, most notably his criticism of the George W. Bush administration, his contact with the Presidents of Venezuela and Cuba, and his humanitarian work in the aftermath of Hurricane Katrina and the 2010 Haiti earthquake. Penn also attracted media attention for his previous marriages to pop icon Madonna and actress Robin Wright.
Penn launched his film career with the 1981 action-drama ''Taps,'' where he played a key role, as a military high school cadet, opposite protagonist Timothy Hutton. Tom Cruise also made one of his first film appearances, as another cadet. A year later, Penn appeared in the hit comedy ''Fast Times at Ridgemont High'', in the role of surfer-stoner Jeff Spicoli, with his character helping popularize the word "dude" in popular culture. In 1983, Penn appeared as Mick O'Brien, a troubled youth, in the drama ''Bad Boys''. The role earned Penn favorable reviews and jump-started his career as a serious actor.
In 1985, Penn played Andrew Daulton Lee in the film ''The Falcon and the Snowman'', which closely followed an actual criminal case. Lee was a former drug dealer by trade, convicted of espionage for the Soviet Union and originally sentenced to life in prison, later being paroled in 1998. Penn later hired Lee as his personal assistant, partly because he wanted to reward Lee for allowing him to play Lee in the film; also, he was a firm believer in rehabilitation and thought Andrew Lee should be successfully reintegrated into society, since he was a free man again.
In 1986, he starred in the drama ''At Close Range'', opposite Christopher Walken. The film featured his then-wife Madonna's single "Live to Tell". The music video for the song, which featured clips from the film, played heavily on MTV and helped promote the film. Penn stopped acting for a few years in the early 1990s, having been dissatisfied with the industry, and focused on making his directing debut.
Penn, nominated for the Academy Award for Best Actor five times, has won the award twice. The Academy first recognized his work in nominating him for playing a racist murderer on death row in Tim Robbins' 1995 drama ''Dead Man Walking''. Penn was nominated again for his comedic performance as an egotistical jazz guitarist in Woody Allen's 1999 release ''Sweet and Lowdown''. He received his third nomination after portraying a mentally-handicapped father in 2001's ''I am Sam''. Penn finally won for his role in Clint Eastwood's 2003 Boston crime-drama ''Mystic River''. In 2004, he played a disturbed man bent on killing the president in ''The Assassination of Richard Nixon''. He was invited to join the Academy of Motion Picture Arts and Sciences in 2004.
In 2006, he portrayed populist governor Willie Stark (based on Huey Long) in an adaptation of the classic American novel ''All the King's Men'', though the film was a critical and commercial failure. In November 2008, Penn earned rave reviews for his portrayal of real-life gay-rights icon and politician Harvey Milk in the biopic ''Milk'' and was nominated for best actor for the 2008 Independent Spirit Awards. The film also earned Penn his fifth nomination and second win for the Academy Award for Best Actor. In 2010 he starred as Joseph Wilson in ''Fair Game'', a film adaptation of Valerie Plame's 2007 memoir. Penn co-starred with Brad Pitt and Jessica Chastain in the drama ''The Tree of Life'' which won the Palme d'Or at the 2011 Cannes Film Festival.
He soon began a relationship with actress Robin Wright, and their first child – a daughter named Dylan Frances – was born in 1991. Their second child, a son whom they named Hopper Jack, was born in 1993. Penn and Wright married in 1996 and lived in Ross, California. The relationship went through on-and-off periods in the late 2000s (decade). The couple filed for divorce in December 2007, but reconciled several months later, requesting a court dismissal of their divorce case. In April 2009, Penn filed for legal separation, only to withdraw the case once again when the couple reconciled in May. On August 12, 2009, Wright Penn filed for divorce again. The couple's divorce was finalized on July 22, 2010, with the couple reaching a private agreement on child and spousal support, division of assets, and custody over their underage son.
During a separation from Wright in the mid 1990s, Penn dated singer and songwriter Jewel. He was also the director of the original video for Jewel's hit song "You Were Meant for Me".
On January 7, 2006, Penn was a special guest at the Progressive Democrats of America, where he was joined by author and media critic Norman Solomon, Democratic congressional candidate Charles Brown, and activist Cindy Sheehan. The "Out of Iraq Forum", which took place in Sacramento, California, was organized to promote the anti-war movement calling for an end to the War in Iraq.
In August 2008, Penn made an appearance at one of Ralph Nader's "Open the Debates" Super Rallies. He protested the political exclusion of Nader and other third parties.
In October 2008, Penn traveled to Cuba, where he met with and interviewed President Raúl Castro.
This advertisement was cited as a primary reason for the development of his relationship with Venezuelan president Hugo Chávez. In one of his televised speeches, Chávez used and read aloud an open letter Penn wrote to Bush. The letter condemned the Iraq War, called for Bush to be impeached, and also called Bush, Vice President Dick Cheney, and Secretary of State Condoleezza Rice "villainously and criminally obscene people.". In August 2007, Penn met with Chávez in Caracas for two hours, after which Chávez praised him for urging Americans to impeach Bush. Penn also visited a new film studio on the outskirts of Caracas, though he did not speak publicly.
On April 19, 2007, Penn appeared on ''The Colbert Report'' and had a "Meta-Free-Phor-All" versus Stephen Colbert that was judged by Robert Pinsky. This stemmed from some of Penn's criticisms of Bush. His exact quote was "We cower as you point your fingers telling us to support our troops. You and the smarmy pundits in your pocket– those who bathe in the moisture of your soiled and blood-soaked underwear– can take that noise and shove it." He won the contest with 10,000,000 points to Colbert's 1.
On December 7, 2007, Penn said he supported Ohio Congressman Dennis J. Kucinich for U.S. President in 2008, and criticized Bush's handling of the Iraq war. Penn questioned whether Bush's twin daughters supported the war in Iraq.
Director Spike Lee interviewed Penn for his documentary ''When the Levees Broke: A Requiem in Four Acts'', about Hurricane Katrina.
Year | Film | Notes |
1991 | ''The Indian Runner'' | |
1995 | ''The Crossing Guard'' | Also writer, Nominated – Golden Lion |
2001 | Nominated – Golden BearNominated – Bodil Award for Best Non-European FilmNominated – Palme d'Or | |
2002 | ''11'9"01 September 11'' | anthology short, segment "U.S.A."UNESCO AwardNominated – César Award for Best Film from the European Union |
2007 | Also writer, Palm Springs International Film Festival Award for Best DirectorRome Film Fest Premiere PrizeSão Paulo International Film Festival Best Foreign Language FilmNominated – Broadcast Film Critics Association Award for Best DirectorNominated – BFCA Critics' Choice Award for Best WriterNominated – Chicago Film Critics Association Award for Best Adapted ScreenplayNominated – Directors Guild of America Award for Best Director – Motion PictureNominated – Film Critics Circle of Australia Award for Best Foreign Film – English LanguageNominated – Writers Guild of America Award for Best Adapted Screenplay |
Category:1960 births Category:Actors from California Category:American agnostics Category:American anti–Iraq War activists Category:American film actors Category:American film directors Category:American people convicted of assault Category:American people of Irish descent Category:American people of Italian descent Category:American people of Jewish descent Category:American people of Russian descent Category:American screenwriters Category:American stage actors Category:American television actors Category:Best Actor Academy Award winners Category:Best Drama Actor Golden Globe (film) winners Category:Independent Spirit Award winners Category:Living people Category:People associated with Charles Bukowski Category:People from Burbank, California Category:People from Marin County, California Category:People from Santa Monica, California
ar:شون بن an:Sean Penn az:Şon Penn bn:শন পেন bar:Penn Sean bg:Шон Пен ca:Sean Penn cs:Sean Penn co:Sean Penn cy:Sean Penn da:Sean Penn de:Sean Penn et:Sean Penn el:Σον Πεν es:Sean Penn eu:Sean Penn fa:شان پن fr:Sean Penn gv:Sean Penn gl:Sean Penn ko:숀 펜 hr:Sean Penn id:Sean Penn it:Sean Penn he:שון פן la:Ioannes Penn lv:Šons Penns lt:Sean Penn hu:Sean Penn ms:Sean Penn nl:Sean Penn ja:ショーン・ペン no:Sean Penn pl:Sean Penn pt:Sean Penn ro:Sean Penn ru:Пенн, Шон sk:Sean Penn sl:Sean Penn sr:Шон Пен sh:Sean Penn fi:Sean Penn sv:Sean Penn tl:Sean Penn th:ฌอน เพนน์ tr:Sean Penn uk:Шон Пенн vi:Sean Penn wuu:桑•班 yo:Sean Penn zh:西恩·潘This text is licensed under the Creative Commons CC-BY-SA License. This text was originally published on Wikipedia and was developed by the Wikipedia community.
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