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Leprosy, also known as Hansen's disease ( HD ), is a long-term infection by the bacteria Mycobacterium leprae or Mycobacterium lepromatosis. [4] [7] Infection can lead to damage of the nerves, respiratory tract, skin, and eyes. [4] This nerve damage may result in a lack of ability to feel pain, which can lead to the loss of parts of a person's ...
The most prominent phenotypic distinction is the nose, which is the feature used most commonly to distinguish between the two groups. The clade for New World monkeys, Platyrrhini, means "flat nosed". The noses of New World monkeys are flatter than the narrow noses of Old World monkeys, and have side-facing nostrils.
Phylogenetic evidence supports the West African potto being the most basal member of the genus Perodicticus, with the other two species being sister species to one another. It is thought to have diverged from the other species during the mid-late Miocene, between 6-10 million years ago. [4]
Wet-tail. Wet-bottom or proliferative ileitis, is a disease of hamsters. It is precipitated by stress. Even with treatment, the animal can die within 48–72 hours. [1] Baby hamsters are much more likely to get the disease than older hamsters. It is commonly found when the hamster is being weaned at about four weeks of age.
Geosmin ( / dʒiˈɒzmɪn / jee-OZ-min) is an irregular sesquiterpenoid, produced from the universal sesquiterpene precursor farnesyl pyrophosphate (also known as farnesyl diphosphate), in a two-step Mg 2+ -dependent reaction. [1] Geosmin, along with the irregular monoterpene 2-methylisoborneol, together account for the majority of biologically ...
Major histocompatibility complex genes, which control the immune response and effective resistance against pathogens, have been able to maintain an extremely high level of allelic diversity throughout time and throughout different populations. Studies suggest that the MHC is involved in mate choice for many vertebrates through olfactory cues. There are several proposed hypotheses that address ...
Nasal sebum. Nasal sebum, also known as nose grease / oil, is grease removed from the surface of the human nose. The pores of the lateral creases (where the nose joins the face) of the exterior of the nose create and store more oil and grease than pores elsewhere on the human body, forming a readily available source of small quantities of ...
Corpse decomposition. Decomposition is the process in which the organs and complex molecules of animal and human bodies break down into simple organic matter over time. In vertebrates, five stages of decomposition are typically recognized: fresh, bloat, active decay, advanced decay, and dry/skeletonized. [1]