Phenoxymethylpenicillin, also known as penicillin V (PcV) and penicillin VK, is an antibiotic useful for the treatment of a number of bacterial infections. Specifically it is used for the treatment of strep throat, otitis media, and cellulitis. It is also used to prevent rheumatic fever and to prevent infections following removal of the spleen. It is given by mouth.Side effects include diarrhea, nausea, and allergic reactions including anaphylaxis. It is not recommended in those with a history of penicillin allergy. It is relatively safe for use during pregnancy. It is in the penicillin and beta lactam family of medications. It usually results in bacterial death.Phenoxymethylpenicillin was first made in 1948 by Eli Lilly. : 121  It is on the World Health Organizations List of Essential Medicines. It is available as a generic medication. In 2017, it was the 242nd most commonly prescribed medication in the United States, with more than two million prescriptions. Medical uses
Specific uses for phenoxymethylpenicillin include:
Infections caused by Streptococcus pyogenes
Tonsillitis
Pharyngitis
Skin infections
Anthrax (mild uncomplicated infections)
Lyme disease (early stage in pregnant women or young children)
Rheumatic fever (primary and secondary prophylaxis)
Streptococcal skin infections
Spleen disorders (pneumococcal infection prophylaxis)
Initial treatment for dental abscesses
Moderate-to-severe gingivitis (with metronidazole)
Avulsion injuries of teeth (as an alternative to tetracycline)
Blood infection prophylaxis in children with sickle cell disease.Penicillin V is sometimes used in the treatment of odontogenic infections. It is less active than benzylpenicillin (penicillin G) against Gram-negative bacteria.
An albino bird has a white beak, white plumage, non-coloured skin, white talons and pink or red eyes. Albinism is only seen in about 1 of every 1,800 birds. The two most common species of albino birds are the common house martin and the American robin. Famous albino birds include "Snowdrop", a Bristol Zoo penguin.In one study, albinism in birds has been categorised according to the extent of pigment absence. –

Total albinism – a simultaneous complete absence of melanin from the eyes, skin, and feathers. This is the rarest form. Only 7% of 1,847 cases of avian albinism examined was this type. Incomplete albinism – when melanin is not simultaneously absent from the eyes, skin and feathers. Imperfect albinism – when melanin is reduced in the eyes, skin and feathers. Partial albinism – when albinism is localized to certain areas of the body.However, it has been argued that the definition of albinism precludes the possibility of "partial albinism" in which a mostly white bird shows some form of melanin pigmentation. "It is simply impossible, just like being partially pregnant. In fish
As with other animals, it has been stated that for fish to be properly described as "albino", they must have a white body and pink or red eyes. Artificially selected
Zebrafish have three types of chromatophores—iridophores, melanophores, and xanthophores—which produce silver, black, and yellow pigmentation respectively. Zebrafish that lack iridophores are known as roy mutants, those that lack melanophores as albino mutants, and those which lack both melanophores and iridophores are ruby mutants.