Special Issue: Sexually Transmitted Infections

Sexually transmitted infections (STIs) are commonly spread via sexual contact and have a major impact on sexual, reproductive and neonatal health, but can also cause disastrous and life-threatening complications if left untreated. In addition to this personal burden, STIs also represent a socioeconomic problem, deriving in treatment costs of tremendous proportions. With this Special Issue, Microbial Cell compiles a series of articles that focus on the eight major STIs: (syphilis, gonorrhea, chlamydia, trichomoniasis, human papilloma virus, herpes simplex virus, hepatitis B virus, and human immunodeficiency virus). Thereby all relevant features of each infection are covered: (i) etiology, transmission and protection; (ii) pathology/symptomatology; (iii) epidemiology, incidence and prevalence; (iv) treatment and curability; and (v) molecular mechanisms of infection.

Advancements in vaginal microbiota, Trichomonas vaginalis, and vaginal cell interactions: Insights from co-culture assays

Fernanda Gomes Cardoso and Tiana Tasca

2025 | 10.15698/mic2025.05.849 | Reviews

This review updates co-culture and co-incubation techniques for studying interactions of Lactobacillus spp., representing a pre-dominant member of the healthy vaginal microbiota; Candida spp., the most abundant yeast in the vagina, and T. vaginalis, responsible for the most widespread nonviral STI worldwide.

Influence of cervicovaginal microbiota on Chlamydia trachomatis infection dynamics

Emily Hand, Indriati Hood-Pishchany, Toni Darville and Catherine M. O’Connell

2025 | 10.15698/mic2025.04.848 | Reviews

This review examines the complex interplay between the cervicovaginal microbiome, C. trachomatis infection, and host immune responses, highlighting the role of metabolites such as short-chain and long-chain fatty acids, indole, and iron in modulating pathogen survival and host defenses.

Neutralizing the threat: harnessing broadly neutralizing antibodies against HIV-1 for treatment and prevention

Juan C Becerra, Lauren Hitchcock, Khoa Vu and Johannes S Gach

2024 | 10.15698/mic2024.07.826 | Reviews

This review provides an overview of the advancements in HIV- 1-specific broadly neutralizing antibodies and discusses the insights gathered from recent clinical trials regarding their application in treating and preventing HIV-1 infection.

Infinity war: Trichomonas vaginalis and interactions with host immune response

Giulia Bongiorni Galego and Tiana Tasca

2023 | 10.15698/mic2023.05.796 | Reviews

Trichomonas vaginalis is the pathological agent of human trichomoniasis with an incidence of 156 million cases worldwide. This review highlights parasite strategies to activate and stimulate or evade variated and complex immunological mechanisms related to the symptoms and clinical complications observed here.

Sexually transmitted infections: old foes on the rise

Didac Carmona-Gutierrez, Katharina Kainz and Frank Madeo

2016 | 10.15698/mic2016.09.522 | Editorial – Special Issue on Sexually Transmitted Infections

Sexually transmitted infections (STIs) are commonly spread via sexual contact. It is estimated that one million STIs are acquired every day worldwide. Besides their impact on sexual, reproductive and neonatal health, they can cause disastrous and life-threatening complications if left untreated. In addition to this personal burden, STIs also represent a socioeconomic problem, deriving in treatment costs of tremendous proportions. Despite a substantial progress in diagnosis, treatment and prevention, the incidence of many common STIs is increasing, and STIs continue to represent a global public health problem and a major cause for morbidity and mortality. With this Special Issue, Microbial Cell provides an in-depth overview of the eight major STIs, covering all relevant features of each infection.

Chlamydia trachomatis Genital Infections

Catherine M. O’Connell and Morgan E. Ferone

2016 | 10.15698/mic2016.09.525 | Reviews

Chlamydia trachomatis infections are the most commonly reported sexually transmitted bacterial infections in the US and globally. Ascending infection may result in infertility, ectopic pregnancy and chronic pelvic pain in some women. In this review we provide an overview of current knowledge regarding epidemiology, disease outcomes and effective treatment of chlamydial genital tract infection and explore potential mechanisms facilitating C. trachomatis infection of genital mucosa identified via bioinformatics and other molecular approaches.

HPV disease transmission protection and control

Neil D. Christensen

2016 | 10.15698/mic2016.09.530 | Reviews

Human papillomaviruses (HPVs) represent a large collection of viral types associated with significant clinical disease of cutaneous and mucosal epithelium. In this review we present an overview of papillomavirus biology and propose a series of questions that provide a basis for discussion of some areas of interest that continue to represent important gaps in our knowledge in the HPV research field.

Hepatitis B virus and its sexually transmitted infection – an update

Takako Inoue and Yasuhito Tanaka

2016 | 10.15698/mic2016.09.527 | Reviews

About 5% of the world’s population has chronic hepatitis B virus (HBV) infection, and nearly 25% of carriers develop chronic hepatitis, cirrhosis, and hepatocellular carcinoma. The purpose of this article is to provide up-to-date information on HBV and HBV infection as a major sexually transmitted infection.

Recent Insights into the HIV/AIDS Pandemic

Juan C. Becerra, Lukas S. Bildstein, Johannes S. Gach

2016 | 10.15698/mic2016.09.529 | Reviews

Acquired immunodeficiency syndrome (AIDS), caused by chronic infection with the human immunodeficiency virus1 (HIV-1), is one of the most devastating pandemics ever recorded in human history. In this review, we assemble new details on the molecular events from the attachment of the virus, to the assembly and release of the viral progeny.

Gonorrhea – an evolving disease of the new millennium

Stuart A. Hill, Thao L. Masters and Jenny Wachter

2016 | 10.15698/mic2016.09.524 | Reviews

Neisseria gonorrhoeae (the gonococcus) is a Gram-negative diplococcus, an obligate human pathogen, and the etiologic agent of the sexually transmitted disease, gonorrhea. This review provides insight into the molecular epidemiology, virulence mechanisms, pathogenesis and therapeutic options.

Syphilis: Re-emergence of an old foe

Lola V. Stamm

2016 | 10.15698/mic2016.09.523 | Reviews

Syphilis is caused by infection with Treponema pallidum subsp. pallidum, a not-yet-cultivable spiral-shaped bacterium that is usually transmitted by sexual contact with an infected partner or by an infected pregnant woman to her fetus. This review provides insights into the etiology, epidemiology, clinical manifestation, diagnosis, treatment and prevention of syphilis.

Genital Herpes: Insights into Sexually Transmitted Infectious Disease

Dinesh Jaishankar and Deepak Shukla

2016 | 10.15698/mic2016.09.528 | Reviews

Genital herpes is one of the most common, persistent and highly infectious sexually transmitted viral infections. This review provides an insight into the epidemiology, pathology, our current understanding of the molecular mechanisms of infection and the currently available and upcoming treatments for genital herpes.

Trichomoniasis – are we giving the deserved attention to the most common non-viral sexually transmitted disease worldwide?

Camila Braz Menezes, Amanda Piccoli Frasson, Tiana Tasca

2016 | 10.15698/mic2016.09.526 | Reviews

Trichomonas vaginalis is the etiologic agent of trichomoniasis, the most common non-viral sexually transmitted disease (STD) in the world. This article contributes to claim the attention of public health policies to control this STD.