CURRENT-AFFAIRS

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• Polio (poliomyelitis) is a highly contagious viral infection that mainly affects children under the age of five. It is transmitted through the fecal-oral route or by consuming contaminated food and water, and can lead to paralysis by attacking the nervous system.
• There are three distinct strains of wild poliovirus (WPV): WPV1, WPV2, and WPV3.
• Polio vaccines include the inactivated polio vaccine (IPV), which provides protection against all three strains, and oral polio vaccines (OPVs), such as the now-obsolete trivalent OPV (tOPV), bivalent OPV (bOPV) targeting WPV1 and WPV3, and monovalent OPVs (mOPV1, mOPV2, mOPV3) for specific strains.

Wild poliovirus type 2 was eradicated in 1999, and wild poliovirus type 3 was eradicated in 2020, marking significant milestones in the global effort to eradicate polio.

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• As of 2023, 440 districts in India report excessive nitrate levels in their groundwater, an increase from 359 districts in 2017, according to a report by the Central Groundwater Board (CGWB).
• About Central Groundwater Board (CGWB):
  • CGWB is a scientific organization under the Department of Water Resources, River Development and Ganga Rejuvenation, Ministry of Jal Shakti, Government of India.
  • It serves as the National Apex Agency responsible for providing scientific inputs for the management, exploration, monitoring, assessment, augmentation, and regulation of the country's groundwater resources.
• Mandate:
  • The board’s key responsibility is to develop and promote technologies, as well as monitor and implement national policies aimed at the scientific and sustainable development and management of India’s groundwater resources. This includes their exploration, conservation, augmentation, protection from pollution, and equitable distribution, following economic and ecological principles.
• Organization Structure:
  • The CGWB is headed by a Chairman and consists of five members.
  • It is a multidisciplinary body, with experts including Hydrogeologists, Geophysicists, Chemists, Hydrologists, Hydrometeorologists, and Engineers.
  • Headquarters: Bhujal Bhawan, Faridabad, Haryana.
• Key Activities of CGWB:
  • National Aquifer Mapping and Management (NAQUIM), involving the preparation of Aquifer Maps and Management Plans.
  • Groundwater exploration to identify areas suitable for groundwater development and to locate potential aquifers.
  • Conducting geophysical surveys to locate groundwater-bearing zones.
  • Periodic assessments of the country’s groundwater resources.
  • Monitoring groundwater levels and quality through observation wells.
  • Disseminating groundwater data and knowledge.
  • Conducting groundwater modeling.
  • Utilizing GIS and remote sensing technologies.
  • Coordinating with State Government Organizations for groundwater regulation and management, through the Central Ground Water Authority (CGWA).
  • Collaborating with State Governments to establish standardized methodologies for groundwater studies.
  • Conducting research and development (R&D) in the groundwater sector, and applying new technologies for groundwater investigation, development, and management.
  • Promoting water conservation and artificial recharge of groundwater.
  • Building capacity and transferring knowledge on groundwater management.

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• High nitrate concentrations have been detected in the groundwater of 440 districts across India, posing potential health risks such as blue baby syndrome in infants, and making the water unsafe for consumption.
• About Blue Baby Syndrome:
  • Blue baby syndrome, also known as cyanosis, is a condition in which an infant’s skin takes on a blue or purple hue.
• What causes blue baby syndrome?
  • The bluish color of the skin occurs when the blood is poorly oxygenated. Normally, blood flows from the heart to the lungs, where it picks up oxygen, and then circulates back through the heart to the rest of the body. If there is an issue with the heart, lungs, or blood, the blood may not receive enough oxygen, causing the skin to appear blue.
  • This oxygen deprivation can be caused by several factors, including congenital heart defects or certain environmental or genetic factors.
  • Acquired methemoglobinemia, a more common form, can result from exposure to various substances or certain health conditions.
  • One of the primary causes of blue baby syndrome is drinking water contaminated with high levels of nitrates.
• Symptoms:
  • The most noticeable symptom of blue baby syndrome is a bluish discoloration of the skin, especially around the mouth, hands, and feet.
  • Other symptoms may include:
    • Difficulty breathing
    • Vomiting
    • Diarrhea
    • Lethargy
    • Increased salivation
    • Loss of consciousness
    • Seizures
    • In severe cases, the condition can be fatal.
• Treatment:
  • Treatment varies depending on the underlying cause of the condition.
  • If congenital heart defects are the cause, surgery may be needed to address the heart abnormalities.
  • For more severe cases, doctors may administer methylene blue through an injection to help restore normal oxygen levels in the blood.

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• Nanopore technology stands as one of the most promising advancements in the fight against diseases, offering new possibilities for research and diagnostics.
• About Nanopore Technology:
  • Nanopore technology involves tiny pores, just a few nanometers in size, embedded in a thin membrane. These pores detect alterations in electrical conductivity when charged biological molecules, smaller than the pores themselves, pass through them. This innovative approach can analyze and sense individual molecules like amino acids, DNA, RNA, and more. It represents a groundbreaking method for sequencing DNA and RNA by monitoring the changes in electrical currents as molecules traverse a nanopore. Unlike traditional sequencing techniques, nanopore sequencing is cost-effective, user-friendly, requires minimal computational and laboratory setup, and needs only a small DNA sample for testing. It is the only sequencing method that offers real-time data analysis, with scalable options ranging from small-scale, portable devices to large-scale, population-level applications. Nanopore technology is capable of analyzing native DNA or RNA and sequencing fragments of varying lengths, from short to ultra-long reads. Furthermore, it can perform targeted sequencing, allowing researchers to focus on specific genes or regions of interest.

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• Recent studies suggest that the icy shell of Jupiter's moon Europa is much thicker than previously believed, which could dampen hopes of finding the necessary conditions for life in the salty oceans hidden beneath its surface.
• About Europa:
  • Europa is the smallest and second-closest of Jupiter's four large moons (known as the Galilean satellites), which were discovered by the Italian astronomer Galileo in 1610. This fascinating moon is a rocky body, enveloped in an exceptionally smooth and intricately patterned layer of ice. With a diameter of 3,130 km (1,940 miles), Europa is slightly smaller than Earth’s Moon. It is considered one of the most promising locations in our solar system for the discovery of environments that might support some form of life beyond Earth. Scientists believe that beneath its icy exterior lies a vast saltwater ocean, containing twice the amount of water found in Earth's global oceans. This ocean is thought to possibly contain the essential chemical elements needed for life. Europa was first closely observed by the Voyager 1 and 2 spacecraft in 1979, followed by more detailed studies from the Galileo orbiter starting in the mid-1990s. In an effort to further explore Europa's potential for life, NASA launched the Europa Clipper mission on October 14, 2024, aimed at investigating whether the moon's subsurface environment could harbor life.

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