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Related Concept Videos

Sexually Transmitted Infections01:26

Sexually Transmitted Infections

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Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...
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Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...
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Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
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Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...
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Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
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Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
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Related Experiment Video

Updated: Jul 19, 2025

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HIV infection.

Linda-Gail Bekker1, Chris Beyrer2, Nyaradzo Mgodi3

  • 1The Desmond Tutu HIV Centre, University of Cape Town, RSA, Cape Town, South Africa. Linda-Gail.Bekker@hiv-research.org.za.

Nature Reviews. Disease Primers
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Summary
This summary is machine-generated.

Human Immunodeficiency Virus (HIV) infection is a manageable chronic condition thanks to diagnostics and antiretroviral therapy. Continued research into vaccines and cures is essential for ultimate epidemic control and improved quality of life.

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Area of Science:

  • Public Health
  • Virology
  • Immunology

Background:

  • The Acquired Immunodeficiency Syndrome (AIDS) epidemic, caused by the Human Immunodeficiency Virus (HIV-1), has been a global health crisis for over 40 years, causing approximately 40 million deaths.
  • HIV-1 targets CD4+ T lymphocytes, leading to immune deficiency and potentially death within 2-10 years if untreated.

Purpose of the Study:

  • To review the impact of diagnostics and antiretroviral therapy on HIV/AIDS management.
  • To highlight the current status of HIV infection as a chronic, manageable condition.
  • To emphasize the ongoing need for research towards prevention, treatment, and a cure.

Main Methods:

  • Review of historical data and current research trends in HIV/AIDS.
  • Analysis of the impact of antiretroviral therapy and diagnostics on patient outcomes and transmission.
  • Synthesis of information on future research directions, including vaccines and immunotherapies.

Main Results:

  • Rapid diagnostics and effective antiretroviral therapy have significantly reduced HIV/AIDS mortality and morbidity.
  • Viral suppression through therapy eliminates sexual transmission and improves health outcomes, making HIV a manageable chronic condition.
  • Focus is shifting towards long-term well-being, managing comorbidities, and ensuring a good quality of life for individuals with HIV.

Conclusions:

  • HIV infection is now a manageable chronic condition, but universal access to prevention and treatment is crucial for epidemic control.
  • Ongoing research is vital for developing therapeutic and preventive vaccines, novel immunotherapies, and ultimately, a cure for HIV/AIDS.
  • Future efforts must prioritize long-term patient well-being, addressing multimorbidity, and enhancing quality of life.