1756 CE - Frederick the Great sends Prussian troops across his borders into Saxony, thus igniting the Seven Years' War with the Habsburg Empire. The conflict will ultimately involve all of the major European powers.
Photo of the Day
In the News
Obama Says Does Not Yet Have Broad Strategy for ISIS
Video Shows ISIS Executes Scores of Syrian Soldiers
US Openly Accuses Russia of Sending Combat Troops to Ukraine
West Africa Ebola Outbreak Could Infect 20,000 People, WHO Says
Scientists Solve Mystery of Moving Death Valley Rocks
Video Shows ISIS Executes Scores of Syrian Soldiers
US Openly Accuses Russia of Sending Combat Troops to Ukraine
West Africa Ebola Outbreak Could Infect 20,000 People, WHO Says
Scientists Solve Mystery of Moving Death Valley Rocks
Quote of the Day
"What office is there which involves more responsibility, which requires more qualifications, and which ought, therefore, to be more honourable, than that of teaching?" --Harriet Martineau
Song of the Day
Artist - BT
Album - Movement in Still Life
Film of the Day
Director - Stephen Herek
Wiki of the Day
Mycobacterium leprae, also known as Hansen’s coccus spirilly, mostly found in warm tropical countries, is a gram-positive bacterium that causes leprosy (Hansen's disease).[1] It is an intracellular, pleomorphic, acid-fast bacterium.[2] M. leprae is an aerobic bacillus (rod-shaped) surrounded by the characteristic waxy coating unique to mycobacteria. In size and shape, it closely resembles Mycobacterium tuberculosis. Due to its thick waxy coating, M. leprae stains with a carbol fuchsin rather than with the traditional Gram stain. The culture takes several weeks to mature.
Optical microscopy shows M. leprae in clumps, rounded masses, or in groups of bacilli side by side, and ranging from 1–8 μm in length and 0.2–0.5 μm in diameter.[3]
It was discovered in 1873 by the Norwegian physician Gerhard Armauer Hansen, who was searching for the bacteria in the skin nodules of patients with leprosy. It was the first bacterium to be identified as causing disease in humans.[4][5] The organism has never been successfully grown on an artificial cell culture medium.[2] Instead, it has been grown in mouse foot pads and more recently in nine-banded armadillos because they, like humans, are susceptible to leprosy. This can be used as a diagnostic test for the presence of bacilli in body lesions of suspected leprosy patients. The difficulty in culturing the organism appears to be because it is an obligate intracellular parasite that lacks many necessary genes for independent survival. The complex and unique cell wall that makes members of the Mycobacterium genus difficult to destroy is apparently also the reason for the extremely slow replication rate.
No comments:
Post a Comment