Amenorrhoea is a symptom with many potential causes. Primary amenorrhoea (menstrual cycles never starting) may be caused by developmental problems such as the congenital absence of the uterus, failure of the ovary to receive or maintain egg cells. Also, delay in pubertal development will lead to primary amenorrhoea.
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.
8 ways to keep mosquitos away naturally. Keep mosquitos away naturally. Mosquitoes transmit diseases to an estimated 600 million people annually worldwide, of which millions that are infected will result in death. The mosquito borne diseases are the viral disease yellow fever, dengue fever, and mostly the Aedes aegypti mosquito transmits them. The genus Anopheles mosquito carries malaria.