© CSA-Images/istockphoto.com

In recent years, the bacterial communities living in and on our bodies have captivated scientists and the public alike. The gut microbiome has been tied to diverse functions and linked to both health and disease. But researchers now know that the gastrointestinal tract is just one of the many microbial homes on the human body. Even sites once considered sterile—such as the eye and the reproductive organs—are revealing themselves to be hotbeds of diversity. Here, The Scientist looks at some of these bacterial communities outside the gut, including the vagina, the penis, the breast, the lung, and more.

Recent Features

The Maternal Microbiome

Moms bombard their babies with bugs both before and after they’re born. By Kerry Grens


Characterizing the “Healthy” VaginaThe overly simplistic notion of a Lactobacillus-dominated vaginal microbiome is giving way to an appreciation of diverse and dynamic bacterial communities. By Jef Akst


Visualizing the Ocular MicrobiomeResearchers are beginning to study in depth the largely uncharted territory of the eye’s microbial composition. By


Parsing the Penis Microbiome

Circumcision and sexual activity are but two factors that can influence the bacterial communities that inhabit male genitalia. By Tracy Vence


Breathing Life into Lung Microbiome Research

Although it’s far less populated than the mouth community that helps feed it, researchers increasingly appreciate the role of the lung microbiome in respiratory health. By


Microbes of the Skin

Human skin, the barrier between the body and the outside world, is home to diverse microorganisms, some of which can promote immunity or fight invaders. By Jef Akst


Mining the Mouth’s Many Microbes

The oral cavity contains several distinct and dynamic microbial communities, and some of these commensals may seed the body’s other microbiomes. By Tracy Vence


From the August 2014 issue:

The Body’s Ecosystem

Research on the human microbiome is booming, and scientists have moved from simply taking stock of gut flora to understanding the influence of microbes throughout the body.

© ISTOCK.COM/LEONTURA/SORBETTO

Other microbiome news:

The Necrobiome

Mouth Microbe Turns Carcinogenic

Circumcision Alters the Penis Microbiome

Cystic Fibrosis Alters Microbiome?

Bacterial Sentinels of Noses

Microbiome Changes During Pregnancy

Microbial Menagerie

Opinion: Who Are We Really?

Q&A: Preserving The Body's Bugs

3D illustration of a gold lipid nanoparticle with pink nucleic acid inside of it. Purple and teal spikes stick out from the lipid bilayer representing polyethylene glycol.
February 2025, Issue 1

A Nanoparticle Delivery System for Gene Therapy

A reimagined lipid vehicle for nucleic acids could overcome the limitations of current vectors.

View this Issue
Enhancing Therapeutic Antibody Discovery with Cross-Platform Workflows

Enhancing Therapeutic Antibody Discovery with Cross-Platform Workflows

Considerations for Cell-Based Assays in Immuno-Oncology Research

Considerations for Cell-Based Assays in Immuno-Oncology Research

An illustration of animal and tree silhouettes.

From Water Bears to Grizzly Bears: Unusual Animal Models

Sex Differences in Neurological Research

Sex Differences in Neurological Research

Products

Photo of a researcher overseeing large scale production processes in a laboratory.

Scaling Lentiviral Vector Manufacturing for Optimal Productivity

Thermo Fisher Logo
Discover a serum-free way to produce dendritic cells and macrophages for cell therapy applications.

Optimizing In Vitro Production of Monocyte-Derived Dendritic Cells and Macrophages

Thermo Fisher Logo
Collage-style urban graphic of wastewater surveillance and treatment

Putting Pathogens to the Test with Wastewater Surveillance

An illustration of an mRNA molecule in front of a multicolored background.

Generating High-Quality mRNA for In Vivo Delivery with Lipid Nanoparticles

Thermo Fisher Logo