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Harrison's groove, also known as Harrison's sulcus, is a horizontal groove along the lower border of the thorax corresponding to the costal insertion of the diaphragm; it is usually caused by chronic asthma or obstructive respiratory disease. It may also appear in rickets because of defective mineralisation of the bones by calcium necessary to ...
The prominent knobs of bone at the costochondral joints of rickets patients are known as a rachitic rosary or beading of the ribs.The knobs create the appearance of large beads under the skin of the rib cage, hence the name by analogy with the beads of a Catholic Christian rosary.
Dictyocaulus viviparus found in the bronchi of a calf during necropsy (arrow). Parasitic bronchitis, also known as hoose, husk, or verminous bronchitis, [1] is a disease of sheep, cattle, goats, [2] and swine caused by the presence of various species of parasite, commonly known as lungworms, [3] in the bronchial tubes or in the lungs.
Bovine respiratory disease (BRD) is the most common and economically devastating infectious disease affecting beef cattle in the world. [1] It is a complex, bacterial or viral infection that causes pneumonia in calves which can be fatal. It also affects many other species of feedlot animals like sheep and pigs, but is most prominent in calves. [2]
A political and public health crisis resulted, and British beef was banned from export to numerous countries around the world, with some bans remaining in place until as late as 2019. [ 1 ] The outbreak is believed to have originated in the practice of supplementing protein in cattle feed by meat-and-bone meal (MBM), which used the remains of ...
The disease is common in sub-Saharan Africa, but can ultimately be found wherever Amblyomma ticks are present. Major areas of concern for the disease also include Madagascar, Mauritius, Zanzibar, the Comoros Islands, and Sao Tomé. Heartwater has been observed on three of the Caribbean islands, Guadeloupe, Marie-Galante, and Antigua.
Rickettsia rickettsii is a Gram-negative, intracellular, cocco-bacillus bacterium that was first discovered in 1902. [1] Having a reduced genome, the bacterium harvests nutrients from its host cell to carry out respiration, making it an organo-heterotroph.
After working as a research student from 1905 to 1907, Mellanby studied medicine at St. Thomas's Hospital in London, and in 1913 became a medical doctor. He served as a lecturer at King's College for Women in London from 1913 to 1920, during which time he was asked to investigate the cause of rickets.