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Related Concept Videos

Sexually Transmitted Infections01:26

Sexually Transmitted Infections

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...
Transmission of Pathogens01:24

Transmission of Pathogens

Pathogens spread from their reservoirs to susceptible hosts through three main routes: contact transmission, vehicle transmission, and vector transmission. Each route involves distinct mechanisms of transfer.Contact TransmissionThis category includes direct contact, indirect contact, and droplet transmission:Direct contact involves immediate physical interaction between individuals—such as a handshake—which can spread pathogens like Streptococcus pyogenes, the bacterium responsible for...
Development of Immunocompetence01:22

Development of Immunocompetence

The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
Immunodeficiency Diseases01:25

Immunodeficiency Diseases

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.
There are three main causes of immunodeficiency disorders...
Retrovirus Life Cycles01:10

Retrovirus Life Cycles

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 retrovirus to...
Development of the Oral Microbiota01:28

Development of the Oral Microbiota

The establishment of the oral microbiome begins before birth, challenging the long-held belief that the fetal oral cavity is sterile. The presence of oral microbes such as Streptococcus and Fusobacterium in amniotic fluid suggests that microbial exposure may occur in utero, potentially through translocation from the maternal oral or gastrointestinal tract. This early colonization primes the neonatal immune system and sets the stage for subsequent microbial succession. Maternal health,...

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TB testing in HIV-positive patients prior to antiretroviral treatment.

The international journal of tuberculosis and lung disease : the official journal of the International Union against Tuberculosis and Lung Disease·2022
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Are we doing enough? Improved breastfeeding practices at 14 weeks but challenges of non-initiation and early cessation of breastfeeding remain: findings of two consecutive cross-sectional surveys in KwaZulu-Natal, South Africa.

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Is it time for South Africa to end the routine high-dose vitamin A supplementation programme?

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Related Experiment Video

Updated: Jun 27, 2026

Isolation of Leukocytes from Human Breast Milk for Use in an Antibody-dependent Cellular Phagocytosis Assay of HIV Targets
08:12

Isolation of Leukocytes from Human Breast Milk for Use in an Antibody-dependent Cellular Phagocytosis Assay of HIV Targets

Published on: September 6, 2019

Breast-feeding and HIV transmission.

A Coutsoudis1

  • 1Department of Paediatrics and Child Health, University of Natal, Private Bag 7, Congella 4013, South Africa.

Nutrition Research Reviews
|December 18, 2008
PubMed
Summary

Reducing HIV transmission risk during breastfeeding involves balancing infant health with maternal infection stage and feeding duration. Exclusive breastfeeding with early cessation may be a viable option.

Area of Science:

  • Public Health
  • Infectious Diseases
  • Pediatrics

Background:

  • Breastfeeding can transmit Human Immunodeficiency Virus (HIV) from mother to infant.
  • Transmission risk is influenced by maternal infection stage, breastfeeding duration, feeding type, and breast health.
  • Previous research indicates a 14% HIV transmission risk with over two years of breastfeeding.

Purpose of the Study:

  • To review strategies for minimizing HIV transmission risk through breastfeeding.
  • To evaluate the risks and benefits of breastfeeding cessation versus formula feeding in resource-poor settings.
  • To explore the potential of exclusive breastfeeding with early cessation as a risk reduction method.

Main Methods:

  • Review of existing studies and meta-analyses on HIV transmission via breastfeeding.

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A Common Marmoset Model of Mother-Infant Intervention for Breastfeeding Disorders in the Presence of Paternal Inhibition and Maternal Neglect
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A Common Marmoset Model of Mother-Infant Intervention for Breastfeeding Disorders in the Presence of Paternal Inhibition and Maternal Neglect

Published on: September 22, 2023

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Last Updated: Jun 27, 2026

Isolation of Leukocytes from Human Breast Milk for Use in an Antibody-dependent Cellular Phagocytosis Assay of HIV Targets
08:12

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Published on: September 6, 2019

Intranasal Immunization and Milk Collection in Studies of Maternal Immunization in New Zealand White Rabbits (Oryctolagus cuniculus)
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Intranasal Immunization and Milk Collection in Studies of Maternal Immunization in New Zealand White Rabbits (Oryctolagus cuniculus)

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A Common Marmoset Model of Mother-Infant Intervention for Breastfeeding Disorders in the Presence of Paternal Inhibition and Maternal Neglect
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A Common Marmoset Model of Mother-Infant Intervention for Breastfeeding Disorders in the Presence of Paternal Inhibition and Maternal Neglect

Published on: September 22, 2023

  • Analysis of factors influencing postnatal HIV transmission.
  • Evaluation of infant health outcomes associated with different feeding practices.
  • Main Results:

    • Shorter breastfeeding durations may reduce HIV transmission risk.
    • Exclusive breastfeeding may not increase HIV transmission risk at six months compared to mixed feeding.
    • Large-scale replacement feeding programs can be detrimental in resource-poor settings due to low education and poor access to services.

    Conclusions:

    • Strategies exist to reduce HIV transmission risk during breastfeeding.
    • Policy decisions regarding infant feeding must consider the risks of malnutrition and mortality associated with formula feeding in resource-limited areas.
    • Exclusive breastfeeding with early cessation presents a potential option for some mothers to mitigate HIV transmission risks.