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Microorganisms exhibit diverse oxygen requirements and growth patterns driven by their metabolic strategies and environmental adaptations. Oxygen, while essential for many organisms, can also be toxic under certain conditions, shaping how microorganisms grow and survive.Oxygen Requirements of MicroorganismsMicroorganisms are classified based on their ability to use or tolerate oxygen:● Obligate aerobes like Mycobacterium tuberculosis need oxygen for energy production, as it serves as the...
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Hypoxia is a medical condition characterized by an inadequate oxygen supply to body tissues. It typically manifests as a bluish discoloration of the skin and mucosae, especially in fair-skinned individuals, when hemoglobin (Hb) saturation drops below 75%.
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Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...
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When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
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Oxygen therapy has emerged as a significant tool in enhancing the quality of life for patients suffering from pulmonary arterial hypertension (PAH). While this therapy has principally been studied on patients with significant hypoxemia, this therapeutic approach helps prevent potential organ damage and can be administered in the comfort of one's home.
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Adverse Drug Reactions (ADRs) are potential complications that arise during pharmacotherapy, influenced by multiple risk factors. Age plays a significant role; both neonates and the elderly are at heightened risk due to their respective immature and diminished metabolic and elimination processes. Gender also impacts ADRs, with females experiencing a 1.5 to 1.7-fold greater risk than males, which may be linked to pharmacokinetic, pharmacodynamic, and hormonal differences. Notably, neonates, the...
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Author Spotlight: Oxygen-Independent Assays to Measure Mitochondrial Function in Mammals
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OXYGEN TOXICITY.

A Chawla1, A K Lavania2

  • 1Postgraduate trainee, Department of Physiology, Armed Forces Medical College, Pune - 411 040.

Medical Journal, Armed Forces India
|July 14, 2016
PubMed
Summary
This summary is machine-generated.

High oxygen levels can be toxic, causing central nervous system, pulmonary, and ocular issues, especially in premature infants. Early detection and prevention are crucial for managing oxygen toxicity.

Keywords:
Free radicalsHyperbaric Oxygen Therapy (HBOT)Oxygen toxicity

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Area of Science:

  • Biomedical Science
  • Physiology

Background:

  • Oxygen is essential for life but can become toxic at elevated partial pressures.
  • Oxygen toxicity can result from increased inspired oxygen concentration or environmental pressure.

Purpose of the Study:

  • To review the manifestations and management of oxygen toxicity.
  • To highlight the importance of prevention and early detection of oxygen toxicity.

Main Methods:

  • Literature review of oxygen toxicity.
  • Analysis of clinical manifestations and contributing factors.

Main Results:

  • Oxygen toxicity presents with central nervous system, pulmonary, and ocular effects.
  • Ocular toxicity is particularly noted in premature infants.
  • Toxicity onset and severity depend on oxygen concentration, exposure duration, and individual susceptibility.

Conclusions:

  • Oxygen toxicity is a significant concern requiring careful management.
  • Prevention and early detection are key to mitigating adverse effects.
  • Treatment for oxygen toxicity is primarily symptomatic.