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Bridge scour is the removal of sediment such as sand and gravel from around bridge abutments or piers. Hydrodynamic scour, caused by fast flowing water, can carve out scour holes, compromising the integrity of a structure. [1] In the United States, bridge scour is one of the three main causes of bridge failure (the
It causes disease in poultry, [2] cattle, [3] horses, [4] and pigs. [5] Most notably, it is the agent that causes porcine exudative epidermitis, also known as greasy pig disease, in piglets. [6] S. hyicus is generally considered to not be zoonotic, [1] however it has been shown to be able to cause bacteremia and sepsis in humans. [7] [8]
Road bridge Bridge scour caused by jack posts installed 4 days earlier caused instability and led to the partial collapse of the northern arch 0 dead, 0 injured (the bridge was closed to traffic at the time) Partial collapse (northern arch) Fully demolished in July 2020 and rebuilt. [146] Rebuilt bridge opened to traffic in October 2021. [147]
Porcine intestinal spirochaetosis is a notifiable pig disease caused by certain spirochetal bacteria (Brachyspira hyodysenteriae and Brachyspira pilosicoli. Infection causes mild gastrointestinal signs in young pigs and can also be transmitted as intestinal spirochetosis in humans, as it is a zoonosis.
Streptococcus suis is a peanut-shaped, Gram-positive bacterium, and an important pathogen of pigs. Endemic in nearly all countries with an extensive pig industry, S. suis is also a zoonotic disease, capable of transmission to humans from pigs.
Then, in 1952, the virus escaped from California in a trainload of infected pork. Garbage-fed pig herds came down with the disease, and it spread from them to neighboring herds until herds in 43 states were affected. It was eventually stamped out in 1956 by a major slaughter policy combined with a ban on feeding uncooked garbage to pigs.
A large cargo ship lost control of its engines and went nearly full throttle through a South Carolina harbor Wednesday, prompting the closure of one of the busiest bridges in the state. Harbor ...
Hydrodynamic scour is the removal of sediment such as silt, sand and gravel from around the base of obstructions to the flow in the sea, rivers and canals. Scour, caused by fast flowing water, can carve out scour holes, compromising the integrity of a structure.