Although my background and training was in environmental microbiology, I contacted a lab at the medical school at Washington University that was just starting to use techniques developed by environmental microbiologists to study microbes inhabiting
the human intestinal tract.
Two of the largest efforts are the Human Microbiome Project, funded by the National Institutes of Health (See «Your Microbial Menagerie,» page 4), and the European Union's Metagenomics of
the Human Intestinal Tract.
Like
the human intestinal tract, the mosquito midgut contains a diverse microbial flora, which may compromise the ability of Plasmodium to establish infection.
A deep global analysis of the gut microbiota composition was done by phylogenetic microarray analysis using
a Human Intestinal Tract Chip (HITChip), an analytical device designed specifically for studying gut bacteria.
In their demonstration, the researchers used the bacterium Bacteroides thetaiotaomicron, a microbe that lives in
the human intestinal tract, as their «donor organism,» that is the one whose functions they wanted to study in more detail.
Parasitic worms (helminths) can be found in
the human intestinal tract, urinary tract or bloodstream.
L. gasseri is a normal inhabitant of
the human intestinal tract, and it is also part of the vaginal microflora.
This bacteria is present in
the human intestinal tract and mouth, and helps stabilize the balance between good and harmful bacteria within the gastrointestinal tract.
The human intestinal tract is 25 to 30 feet in length and covers a surface area the size of a tennis court.
Roundworm eggs hatch in
the human intestinal tract, and from there, travel to other parts of the body, including the eyes and brain.
The eggs then hatch in
the human intestinal tract and the immature roundworms migrate to tissues in the body.
The eggs hatch in
the human intestinal tract, and the immature worms travel to various tissues in the body, including the eyes and brain, causing serious reactions.