The cause of muscle cramps isn't always known. Muscle cramps may be brought on by many conditions or activities, such as: 1  Exercising, injury, or overuse of muscles. 2  Pregnancy. 3  Cramps may occur because of decreased amounts of minerals, such as calcium and magnesium, especially in the later months of pregnancy.
Causes of Otitis externa. Causes of Otitis externa. Otitis externa is caused by a bacterial or viral infection in the external part of the ear canal. A common bacterial pathogen is Pseudomonas aeruginosa. List of causes of Otitis externa. Otitis externa Causes: Risk Factors.
An image of the bacteria, Haemophilus influenzae, known to be the main cause of otitis media in the middle ear. [ [3] ]. Otitis media is an infection of the middle ear, caused mainly by Haemophilus influenza, Streptocococcus pneumonia, or Moraxella catarrhalis, that mostly infects children at a young age.It is harder for young children to fight the microbe or a bacterium because their immune system is not fully developed.uring a viral upper respiratory tract infection(i.e. the common cold), inflammation can block the Eustachian tube. As a result the middle ear does not drain properly and the fluid builds up, becoming a breeding ground for bacteria. Additionally, children have larger adenoid glands than adults.