Related Experiment Video
Updated: Jul 8, 2026

08:15
Humanized NOG Mice for Intravaginal HIV Exposure and Treatment of HIV Infection
Published on: January 31, 2020
[No HIV test: a chance missed]
G E L van den Berk1, A A Jarbandhan, R M Regez
1Onze Lieve Vrouwe Gasthuis, afd. Interne Geneeskunde, Amsterdam.
Nederlands Tijdschrift Voor Geneeskunde
|January 9, 2008
Summary
Early recognition of Human Immunodeficiency Virus (HIV) infection is crucial. Routine HIV testing for high-prevalence groups and those with chronic symptoms can reduce illness, death, and transmission.
Area of Science:
- Infectious Diseases
- Public Health
- Immunology
Background:
- Human Immunodeficiency Virus (HIV) infection remains a significant global health concern.
- Delayed diagnosis of HIV leads to advanced disease and increased transmission rates.
- In the Netherlands, a substantial percentage of individuals with HIV are unaware of their status.
Observation:
- Three patients, presenting with diverse symptoms like weight loss, dyspnoea, joint pain, and diarrhoea, were diagnosed with HIV.
- All diagnosed patients had advanced HIV, indicated by CD4 counts below 100 cells/µL and AIDS-defining conditions.
- These cases highlight that HIV can present with non-specific, chronic symptoms.
Findings:
- Late diagnosis is common in the Netherlands, with an estimated 40% of HIV-positive individuals unaware of their infection.
- Patients presented with AIDS-defining symptoms at the time of diagnosis, indicating a lack of early detection.
- Low CD4 counts (<100 cells/µL) were observed in all diagnosed patients, signifying advanced immunosuppression.
Implications:
- Routine HIV testing should be implemented for populations with HIV prevalence >0.2%.
- Testing should also be offered to patients with unexplained chronic symptoms, regardless of traditional risk factors.
- Earlier HIV detection can significantly decrease patient morbidity and mortality, and curb viral transmission.
Related Concept Videos
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...
Genital Herpes
Genital herpes is a sexually transmitted infection primarily caused by herpes simplex virus type 2 (HSV-2), though herpes simplex virus type 1 (HSV-1) is increasingly implicated in genital infections, particularly among younger populations. Transmission occurs mainly through sexual contact, with asymptomatic viral shedding serving as a major route of spread. This characteristic makes HSV-2 difficult to control at a population level, as individuals may unknowingly transmit the virus even in the...
Herpes
Herpes simplex type 1 (HSV‑1) is a widespread pathogen responsible for orolabial lesions. It is an enveloped, double-stranded DNA (dsDNA) virus belonging to the family Herpesviridae. Once the virus infects a host cell, its double‑stranded DNA genome is delivered into the nucleus, where a coordinated cascade of immediate‑early, early, and late gene expression directs viral DNA replication, structural protein synthesis, and virion assembly. After primary infection of epithelial cells, HSV-1...
Hepatitis
Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver. The...
Trichomoniasis
Trichomonas vaginalis is a flagellated protozoan parasite and the causative agent of trichomoniasis, one of the most prevalent non-viral sexually transmitted infections in the United States. This extracellular parasite primarily colonizes the lower genitourinary tract in women—particularly the vagina—and in men, the urethra and prostate. Its structural and functional adaptations enable its survival, motility, and pathogenicity within the host environment.Structural Features and Host EntryT.
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...
