Honey bees are under extreme pressure. The number of honey bee colonies in the US has been declining at an average rate of almost 40% since 2010. The biggest contributor to this decline is viruses spread by a parasite, Varroa ...
Plants & Animals
Sep 10, 2019
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76
California almond farmers who depend on commercial bee hives to pollinate their lucrative crops would benefit from increased efforts to protect essential bee foraging territory in northern prairie states, according a University ...
Ecology
Jun 17, 2019
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147
Some 200,000 bees inhabiting hives in Notre-Dame cathedral survived the inferno that engulfed the heritage landmark in a miraculous escape, their beekeeper said Thursday.
Ecology
Apr 18, 2019
3
253
Cold temperatures inside honey bee colonies may cause colony losses during and after long-distance hauling, according to a preliminary study by Agricultural Research Service (ARS) scientists.
Ecology
Apr 18, 2019
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7
High up in the hills above Hong Kong, Yip Ki-hok uses nothing but his bare hands to remove a honey-filled nest of swarming bees—a remarkable skill he learned after the hardship of China's famine years.
Ecology
Apr 14, 2019
0
257
A beekeeper teamed up with the Signal Processing Laboratory 5 and a group of EPFL students to develop an app that counts the number of Varroa mites in beehives. This parasite is one of the two main threats – along with ...
Plants & Animals
Jan 30, 2019
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39
Worldwide honeybee populations are in peril – and it's a dire situation for humans. Threats from climate change, toxic pesticides, and disease have all contributed to a steep honeybee population decline since 2006. And ...
Ecology
Dec 21, 2018
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5
Beekeepers and researchers will welcome the unveiling of the small hive beetle's genome by Agricultural Research Service (ARS) scientists and their colleagues. The small hive beetle (SHB) is a major parasite problem of honey ...
Biotechnology
Dec 20, 2018
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1
Efforts to protect the UK's native honey bees could be helped by research that maps their entire genetic make-up.
Ecology
Nov 27, 2018
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7
Almonds, blueberries, apples, melons – all of these fruits, and many more, rely on insect pollination. Some crops rely more on pollinators than others. Insect pollination isn't just about the number of fruits produced – ...
Ecology
May 23, 2018
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2
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.
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