For the second time in two years, Gildardo Urrego is scooping up piles of dead bees after an invisible evil invaded his hives in northwest Colombia, wreaking havoc among his swarms.
Ecology
Feb 26, 2021
12
3005
A drone has been converted into a flying flamethrower in central China in a fiery campaign to eradicate more than 100 wasp nests.
Ecology
Dec 12, 2020
0
207
Just when you think Asian giant hornets' reputation couldn't get any worse, they're about to enter the "slaughter phase" when they attack in force, decapitate their victims and prey upon the brood for days.
Ecology
Oct 05, 2020
1
29
Honeybee colonies are bioindicators of environmental contamination in the area, since they get coated in everything that there is in the environment, including pollutants, and they end up taking it all back to their bee hives.
Environment
Jul 17, 2020
1
31
Researchers often study the genomes of individual organisms to try to tease out the relationship between genes and behavior. A new study of Africanized honey bees reveals, however, that the genetic inheritance of individual ...
Plants & Animals
Jul 06, 2020
1
361
A team of researchers from Nottingham Trent University, l'Institut National de Recherche en Agriculture and Centre Apicole de Recherche et d'Information reports accurately predicting honeybee swarming by listening to sounds ...
While most Romans found Italy's coronavirus quarantine a real buzz kill, the city's bees had a field day.
Ecology
May 14, 2020
0
49
"Murder hornets' have entered the North American landscape and lexicon with horror-film imagery.
Plants & Animals
May 05, 2020
0
95
Among the vast number of native species damaged by the recent bushfire crisis, we must not forget native pollinators. These animals, mainly insects such as native bees, help sustain ecosystems by pollinating native plants.
Ecology
Feb 24, 2020
0
7
Researchers at Royal Holloway have developed a method to track bee-to-bee communication in honeybee hives, showing how bees have many means to learn from their nest mates about the best flowers to visit, but it is their unique ...
Plants & Animals
Feb 10, 2020
0
445
Urticaria (from the Latin urtica, nettle (whence It. ortica, Sp. ortiga, Pg. urtiga, Fr. ortie) urere, to burn) (or hives) is a kind of skin rash notable for pale red, raised, itchy bumps. Hives is frequently caused by allergic reactions; however, there are many non-allergic causes. Most cases of hives lasting less than six weeks (acute urticaria) are the result of an allergic trigger. Chronic urticaria (hives lasting longer than six weeks) is rarely due to an allergy. The majority of patients with chronic hives have an unknown (idiopathic) cause. Perhaps as many as 30–40% of patients with chronic idiopathic urticaria will, in fact, have an autoimmune cause. Acute viral infection is another common cause of acute urticaria (viral exanthem). Less common causes of hives include friction, pressure, temperature extremes, exercise, and sunlight.
Weals (raised areas surrounded by a red base) from urticaria can appear anywhere on the surface of the skin. Whether the trigger is allergic or non-allergic, there is a complex release of inflammatory mediators, including histamine from cutaneous mast cells, resulting in fluid leakage from superficial blood vessels. Wheals may be pinpoint in size, or several inches in diameter. Angioedema is a related condition (also from allergic and non-allergic causes), though fluid leakage is from much deeper blood vessels. Individual hives that are painful, last more than 24 hours, or leave a bruise as they heal are more likely to be a more serious condition called urticarial vasculitis. Hives caused by stroking the skin (often linear in appearance) are due to a benign condition called dermographism.
This text uses material from Wikipedia, licensed under CC BY-SA
