| porcine herpesvirus 2 | A virus causing inclusion body rhinitis in pigs. (05 Mar 2000) |
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| porcine parakeratosis | A skin disease of young pigs characterised by a hard, scaly proliferation of the surface layers of the skin. The extremities are commonly affected first, but it may involve the entire body. Parakeratosis psoriasiformis, an eruption marked by the presence of thick scales resembling those of psoriasis. Parakeratosis pustulosa, idiopathic subungual keratosis with nail deformity or pitting and with pustular or well-demarcated scaling eczematous changes of the fingertips; usually seen in young girls. Parakeratosis scutularis, a disease of the scalp marked by the formation of crusts that envelop the hairs. Synonym: parakeratosis ostracea. (05 Mar 2000) |
| porcine parvovirus | A virus causing stillbirths, abortions, foetal deaths, mummifications, and infertility in swine. (05 Mar 2000) |
| porcine polioencephalomyelitis | Porcine polioencephalomyelitis; a disease of swine caused by porcine enterovirus 1 and resembling human poliomyelitis; it is characterised by stiffness, convulsions, paralysis, and prostration, and is widespread in Europe, with most serious losses occurring in Poland and the Czech Republic and Slovakia. Synonym: infectious porcine encephalomyelitis, porcine polioencephalomyelitis. Origin: Teschen, Silisia (05 Mar 2000) |
| porcine reproductive and respiratory syndrome | <syndrome> A syndrome characterised by outbreaks of late term abortions, high numbers of stillbirths and mummified or weak newborn piglets, and respiratory disease in young unweaned and weaned pigs. It is caused by swine infertility and respiratory syndrome virus. (radostits et al., veterinary medicine, 8th ed, p1048) (12 Dec 1998) |
| porcine sarcoma virus | A retrovirus causing sarcoma in swine. (05 Mar 2000) |
| porcine somatotropin | <protein> A growth hormone found inpigs, injections of or implants containing thishormone cause pigs over 100 pounds to gain more muscle and less fat. Previously the hormone was very expensive because it could only be taken from the pituitary glands of slaughtered pigs, but in the early '90s researchers learned how to genetically engineered the bacterium E. Coli to produce it. The FDA has not yet approved this hormone for use. See: bovine somatotrophin. (09 Oct 1997) |
| porcine stress syndrome | A severe form of fever that occurs as a reaction to certain anaesthetic agents and muscle relaxants. Malignant hyperthermia is an inherited autosomal dominant condition. Inheritance: autosomal dominant. (27 Sep 1997) |
| porcine transmissible gastroenteritis | A rapidly spreading disease of swine, caused by a coronavirus (of the family Coronaviridae) and characterised by severe diarrhoea and vomiting; case fatality rate in pigs younger than 10 days is high; in older pigs it is low. Synonym: porcine transmissible gastroenteritis. (05 Mar 2000) |
| porcine valve | A prosthetic cardiac valve derived from the pig heart, which is preserved and sterilised with glutaraldehyde, and permanently sutured to a shape-retaining artificial strut; in appropriate sizes, it can replace any natural heart valve. Synonym: porcine valve. (05 Mar 2000) |
| porcupine | 1. <zoology> Any Old Word rodent of the genus Hystrix, having the back covered with long, sharp, erectile spines or quills, sometimes a foot long. The common species of Europe and Asia (Hystrix cristata) is the best known. 2. <zoology> Any species of Erethizon and related genera, native of America. They are related to the true porcupines, but have shorter spines, and are arboreal in their habits. The Canada porcupine (Erethizon dorsatus) is a well known species. <medicine> Porcupine ant-eater, any plectognath fish having the body covered with spines which become erect when the body is inflated. See Diodon, and Globefish. <botany> Porcupine grass, the hard outer wood of the cocoa palm; so called because, when cut horizontally, the markings of the wood resemble the quills of a porcupine. Origin: OE. Porkepyn, porpentine, OF. Porc-espi, F. Porc-epic (cf. It. Porco spino, porco spinoso, Sp. Puerco espino, puerco espin, fr. L. Porcus swine + spina thorn, spine). The last part of the French word is perhaps a corruption from the It. Or Sp.; cf. F. Epi ear, a spike of grain, L. Spica. See Pork, Spike a large nail, Spine. Source: Websters Dictionary (01 Mar 1998) |
| porcupine skin | Hyperkeratosis, hypergranulosis, and reticular degeneration in the upper epidermis. Generalised epidermolytic hyperkeratosis is present in bullous congenital ichthyosiform erythroderma. Localised epidermolytic hyperkeratosis may be found in epidermal nevi and benign keratoses. Synonym: porcupine skin. (05 Mar 2000) |