As folate is vital in the first trimester of pregnancy for healthy fetal development, the use of antifolates is strongly contraindicated in pregnancy and carries significant teratogenic risk. Low doses of methotrexate can deplete folate stores and cause side-effects that are similar to folate deficiency.
Cause of Adult Mumps. Adult mumps is caused by an infection with the mumps virus, which is found worldwide. The mumps virus is an RNA (ribonucleic acid) virus from the family Paramyxovirus of the genus Rubulavirus. The mumps virus only infects humans.
Mumps is an illness caused by a virus. It usually occurs in childhood. Mumps are easily spread by airborne droplets from the upper respiratory tract.The disease usually takes 2 to 3 weeks to appear.omplications of mumps occur more frequently among adults than children, and may include: Meningitis or encephalitis. Inflammation of the membrane that covers the brain and spinal cord or inflammation of the brain. Orchitis. Inflammation of one or both testicles.