Subacromial impingement occurs when the subacromial space is narrowed and weak structures in that space get compressed. Several causes for subacromial impingment have been detected: 1  Anatomical variations such as narrow SA space, type II or III acromion, osteophytes.ubacromial impingement occurs when the subacromial space is narrowed and weak structures in that space get compressed. Several causes for subacromial impingment have been detected: 1  Anatomical variations such as narrow SA space, type II or III acromion, osteophytes.
Diseases transmitted by mosquitoes include: malaria, dengue, West Nile virus, chikungunya, yellow fever, filariasis, Japanese encephalitis, Saint Louis encephalitis, Western equine encephalitis, Eastern equine encephalitis, Venezuelan equine encephalitis, La Crosse encephalitis and Zika fever.
1 Mosquitoes become infected when they feed on a person already infected with the virus. 2  Infected mosquitoes can then spread the virus to other people through bites. 3  Chikungunya virus is most often spread to people by Aedes aegypti and Aedes albopictus mosquitoes.4  These are the same mosquitoes that transmit dengue virus. Infected mosquitoes can then spread the virus to other people through bites. 2  Chikungunya virus is most often spread to people by Aedes aegypti and Aedes albopictus mosquitoes. 3  These are the same mosquitoes that transmit dengue virus.