Search results
Results From The WOW.Com Content Network
The species and diversity of the microorganisms may be related to the various levels of hormones during pregnancy. Vaginal flora can be transmitted to babies during birth. Vaginal dysbiosis can lead to vaginal infections like bacterial vaginosis which makes one relatively susceptible to sexually transmitted diseases.
Graphic depicting the human skin microbiota, with relative prevalences of various classes of bacteria. The human microbiome is the aggregate of all microbiota that reside on or within human tissues and biofluids along with the corresponding anatomical sites in which they reside, [1] [2] including the gastrointestinal tract, skin, mammary glands, seminal fluid, uterus, ovarian follicles, lung ...
Salmonella. Salmonella enteritidis; Salmonella typhi; Salmonella typhimurium; Serratia marcescens; Shigella dysenteriae; Spirillum volutans; Staphylococcus
It is estimated that the most numerous bacteria are of a species of the Pelagibacterales (or SAR11) clade, perhaps Pelagibacter ubique, and the most numerous viruses are bacteriophages infecting these species. [19] It is estimated that the oceans contain about 2.4 × 10 28 (24 octillion) SAR11 cells. [20]
Most of the bacteria in and on the body are harmless or rendered so by the protective effects of the immune system, and many are beneficial, [4] particularly the ones in the gut. However, several species of bacteria are pathogenic and cause infectious diseases, including cholera, syphilis, anthrax, leprosy, tuberculosis, tetanus and bubonic plague.
Pathogenic bacteria are bacteria that can cause disease. [1] This article focuses on the bacteria that are pathogenic to humans. Most species of bacteria are harmless and many are beneficial but others can cause infectious diseases. The number of these pathogenic species in humans is estimated to be fewer than a hundred. [2]
The project was designed with the aim of countering that misconception that bacteria are always harmful to humans [20] and that humans are at war with bacteria. [21] In actuality, most strains of bacteria are harmless [13] if not beneficial for the human body. [22] Another of the project's goals is to foster public interest in microbiology. [17]
The colon contains the highest microbial density of any human-associated microbial community studied so far, representing between 300 and 1000 different species. [6] Bacteria are the largest and to date, best studied component and 99% of gut bacteria come from about 30 or 40 species. [7] About 55% of the dry mass of feces is bacteria. [8]