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+ | [[File:Klingon blood screening.jpg|thumb|A Klingon blood screening]] |
| − | '''Blood screenings''' were a procedure that attempted to detect [[Changeling]]s by drawing [[blood]] from the subject. When a Changeling's matter is removed from its central form, it reverts to its [[liquid]] state. [[Odo]] first suggested the procedure in late [[2371]] when a Changeling hijacked the {{USS|Defiant| |
+ | '''Blood screenings''' were a procedure that attempted to detect [[Changeling]]s by drawing [[blood]] from the subject. When a Changeling's matter is removed from its central form, it reverts to its [[liquid]] state. [[Odo]] first suggested the procedure in late [[2371]] when a Changeling hijacked the {{USS|Defiant|2370}}. However, the tactic failed because the Changeling had replaced [[Julian Bashir]], who performed the screenings, and he was able to frame [[Michael Eddington]] as the Changeling instead. ({{DS9|The Adversary}}) |
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By early [[2372]], the [[Klingon]]s also used blood screenings to detect Changelings, but their method was cruder – they simply used an available blade (such as a ''[[d'k tahg]]'') to break the [[skin]] and allow some blood to escape. ({{DS9|The Way of the Warrior}}) It was not discovered until much later that a Changeling was impersonating General [[Martok]], and was able to evade the blood screenings. ({{DS9|Apocalypse Rising}}) |
By early [[2372]], the [[Klingon]]s also used blood screenings to detect Changelings, but their method was cruder – they simply used an available blade (such as a ''[[d'k tahg]]'') to break the [[skin]] and allow some blood to escape. ({{DS9|The Way of the Warrior}}) It was not discovered until much later that a Changeling was impersonating General [[Martok]], and was able to evade the blood screenings. ({{DS9|Apocalypse Rising}}) |
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When the Changelings threatened [[Earth]] in mid-[[2372]], [[Starfleet Command]] adopted an official policy, recommended by [[Benjamin Sisko]] (acting as temporary head of [[Starfleet Security]] on Earth) requiring weekly blood screenings of all [[Starfleet]] personnel and their immediate families. ({{DS9|Homefront}}) However, [[Admiral]] [[Leyton]] managed to fake a blood screening to frame Sisko as a Changeling when Sisko was trying to expose Leyton's attempted ''[[coup]]'' against the [[Federation]] civilian government. ({{DS9|Paradise Lost}}) |
When the Changelings threatened [[Earth]] in mid-[[2372]], [[Starfleet Command]] adopted an official policy, recommended by [[Benjamin Sisko]] (acting as temporary head of [[Starfleet Security]] on Earth) requiring weekly blood screenings of all [[Starfleet]] personnel and their immediate families. ({{DS9|Homefront}}) However, [[Admiral]] [[Leyton]] managed to fake a blood screening to frame Sisko as a Changeling when Sisko was trying to expose Leyton's attempted ''[[coup]]'' against the [[Federation]] civilian government. ({{DS9|Paradise Lost}}) |
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Despite their apparent ineffectiveness, blood screenings continued to be used on occasion as a stopgap measure to guard against Changeling infiltration. ({{DS9|In Purgatory's Shadow|By Inferno's Light}}) |
Despite their apparent ineffectiveness, blood screenings continued to be used on occasion as a stopgap measure to guard against Changeling infiltration. ({{DS9|In Purgatory's Shadow|By Inferno's Light}}) |
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| ⚫ | {{bginfo|It is notable, however, that despite the Federation's reliance on blood screenings, blood screens have '''never''' been successful: no Changeling has ever been detected by a blood screening. In fact, Changelings such as the [[Krajensky (Changeling)|Krajensky Changeling]] and the [[Martok (Changeling)|Martok Changeling]] have used the Federation's reliance on blood screens to their own advantage.}} |
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Revision as of 18:19, 26 June 2011
A Klingon blood screening
Blood screenings were a procedure that attempted to detect Changelings by drawing blood from the subject. When a Changeling's matter is removed from its central form, it reverts to its liquid state. Odo first suggested the procedure in late 2371 when a Changeling hijacked the USS Defiant. However, the tactic failed because the Changeling had replaced Julian Bashir, who performed the screenings, and he was able to frame Michael Eddington as the Changeling instead. (DS9: "The Adversary")
Dr. Bashir performing a blood screening on Gul Dukat
By early 2372, the Klingons also used blood screenings to detect Changelings, but their method was cruder – they simply used an available blade (such as a d'k tahg) to break the skin and allow some blood to escape. (DS9: "The Way of the Warrior") It was not discovered until much later that a Changeling was impersonating General Martok, and was able to evade the blood screenings. (DS9: "Apocalypse Rising")
When the Changelings threatened Earth in mid-2372, Starfleet Command adopted an official policy, recommended by Benjamin Sisko (acting as temporary head of Starfleet Security on Earth) requiring weekly blood screenings of all Starfleet personnel and their immediate families. (DS9: "Homefront") However, Admiral Leyton managed to fake a blood screening to frame Sisko as a Changeling when Sisko was trying to expose Leyton's attempted coup against the Federation civilian government. (DS9: "Paradise Lost")
Joseph Sisko suggested that when the Changelings found out about blood screenings, their first action would be to kill a humanoid and suck up as much blood as they could to use during screenings. (DS9: "Homefront")
Despite their apparent ineffectiveness, blood screenings continued to be used on occasion as a stopgap measure to guard against Changeling infiltration. (DS9: "In Purgatory's Shadow", "By Inferno's Light")
External link
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