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.
Ticks commonly carry disease-causing bacteria, parasites and viruses. Bites from these spider-like pests often transmit infectious diseases to humans. Tick-borne illnesses include Rocky Mountain spotted fever, Lyme disease, ehrlichiosis, babesiosis, Colorado tick fever, Southern tick-associated rash illness, relapsing fever and Q fever. Each of these diseases causes a range of flu-like symptoms, which can confound diagnosis.