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A sexually transmitted infection (STI), also referred to as a sexually transmitted disease (STD) and the older term venereal disease (VD), is an infection that is spread by sexual activity, especially vaginal intercourse, anal sex, oral sex, or sometimes manual sex.
Micrograph of a clue cell (center), covered in bacteria, as compared to an unremarkable squamous cell at bottom left, and a neutrophil at bottom center. Pap stain Phase contrast microscopy of clue cells in a vaginal swab. Clue cells are epithelial cells of the vagina that get their distinctive stippled appearance by being covered with bacteria ...
Under electron microscopy, it appears as a flask-shaped cell with a narrow terminal portion that is crucial for its attachment to the host cell surfaces. [54] The bacterial cell is slightly elongated somewhat like a vase, and measures 0.6–0.7 μm in length, 0.3–0.4 μm at the broadest region, and 0.06–0.08 μm at the tip.
The Human Cell Atlas project, which started in 2016, had as one of its goals to "catalog all cell types (for example, immune cells or brain cells) and sub-types in the human body". [13] By 2018, the Human Cell Atlas description based the project on the assumption that "our characterization of the hundreds of types and subtypes of cells in the ...
Pages in category "Sexually transmitted diseases and infections" The following 75 pages are in this category, out of 75 total. This list may not reflect recent changes .
Public health has been top of mind for many the last couple of years, but there's a public health problem that has largely flown under the radar: a growing rate of sexually transmitted diseases ...
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Chlamydia bacteria have the ability to establish long-term associations with host cells. When an infected host cell is starved for various nutrients such as amino acids (for example, tryptophan ), [ 31 ] iron , or vitamins , this has a negative consequence for chlamydia bacteria since the organism is dependent on the host cell for these nutrients.