| rat-flea typhus | Murine typhus, an acute infectious disease with fever, headache, and rash, all quite similar to, but milder than, epidemic typhus, caused by a related microoganism, rickettsia typhi (mooseri), transmitted to humans by rat fleas (xenopsylla cheopis). The animal reservoir includes rats, mice and other rodents. Murine typhus occurs sporadically worldwide but is more prevalent in congested rat-infested urban areas. Also known as endemic typhus and urban typhus of malaya. (12 Dec 1998) |
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| typhus, rat-flea | See Typhus, murine. (12 Dec 1998) |
| africa, northern | The geographical area of africa comprising algeria, egypt, libya, morocco, and tunisia. It includes also the vast deserts and oases of the sahara. It is often referred to as north africa, french-speaking africa, or the magreb. (12 Dec 1998) |
| blot, northern | A technique in molecular biology, used mainly to separate and identify pieces of RNA. Called a Northern blot only because it is similar to a Southern blot (which is named after its inventor, the British biologist M.E. Southern). (12 Dec 1998) |
| blotting, northern | Detection of RNA that has been electrophoretically separated and immobilised by blotting on nitrocellulose or other type of paper or nylon membrane. (12 Dec 1998) |
| northern | 1. Of or pertaining to the north; being in the north, or nearer to that point than to the east or west. 2. In a direction toward the north; as, to steer a northern course; coming from the north; as, a northern wind. Northern diver. <zoology> See Loon. Northern lights. See Aurora borealis, under Aurora. <botany> Northern spy, an excellent American apple, of a yellowish colour, marked with red. Origin: AS. Northerne. Source: Websters Dictionary (01 Mar 1998) |
| Northern blot | <molecular biology, procedure> An electroblotting method in which RNA is transferred to a filter and detected by hybridisation to (32)P labelled RNA or DNA. (18 Nov 1997) |
| Northern blot analysis | A procedure similar to the Southern blot analysis, used mostly to separate and identify RNA fragments; typically via transferring RNA fragments from an agarose gel to a nitrocellulose filter followed by detection with a suitable probe. Origin: coined to distinguish it from eponymic Southern blot a. (05 Mar 2000) |
| northern territory | A territory in north central Australia, east of the state of queensland. Its capital is darwin. Originally a part of new south wales, it was annexed to south Australia in 1863, entered the commonwealth as part of it in 190l, transferred to the commonwealth in 1911, divided in 1927, but was reestablished in 1931. It was granted self government within the commonwealth of Australia in 1978. (12 Dec 1998) |
| water flea | <zoology> Any one of numerous species of small aquatic Entomostraca belonging to the genera Cyclops, Daphnia, etc; so called because they swim with sudden leaps, or starts. Source: Websters Dictionary (01 Mar 1998) |
| typhus, endemic flea-borne | An infectious disease clinically similar to epidemic louse-borne typhus (typhus, epidemic louse-borne), but caused by rickettsia typhi, which is transmitted from rat to man by the rat flea, xenopsylla cheopis. (12 Dec 1998) |
| flea | <entomology> An insect belonging to the genus Pulex, of the order Aphaniptera. Fleas are destitute of wings, but have the power of leaping energetically. The bite is poisonous to most persons. The human flea (Pulex irritans), abundant in Europe, is rare in America, where the dog flea (P. Canis) takes its place. A flea in the ear, an unwelcome hint or unexpected reply, annoying like a flea; an irritating repulse; as, to put a flea in one's ear; to go away with a flea in one's ear. Beach flea, Black flea, etc. See Beach, etc. Origin: OE. Fle, flee, AS. Flea, fleah; akin to D, OHG. Flh, G. Floh, Icel. Fl, Russ. Blocha; prob. From the root of E. Flee. 84. See Flee. (30 Mar 1998) |
| flea-beetle | <zoology> A small beetle of the family Halticidae, of many species. They have strong posterior legs and leap like fleas. The turnip flea-beetle (Phyllotreta vittata) and that of the grapevine (Graptodera chalybea) are common injurious species. Source: Websters Dictionary (01 Mar 1998) |
| flea-bitten kidney | The kidney seen at autopsy in some cases of bacterial endocarditis, the appearance being caused by diffuse petechial haemorrhages resulting from focal glomerulonephritis. (05 Mar 2000) |
| flea-borne typhus | An acute infectious disease with fever, headache, and rash, all quite similar to, but milder than, epidemic typhus, caused by a related microoganism, rickettsia typhi (mooseri), transmitted to humans by rat fleas (xenopsylla cheopis). The animal reservoir includes rats, mice and other rodents. Murine typhus occurs sporadically worldwide but is more prevalent in congested rat-infested urban areas. Also known as endemic typhus, rat-flea typhus; urban typhus of malaya). (12 Dec 1998) |