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.iscomfort in the salivary glands (in the front of the neck), which may become swollen and tender. Difficulty chewing. Pain and tenderness of the testicles. Fever. Headache. Muscle aches. Tiredness. Loss of appetite. The symptoms of mumps may look like other conditions or medical problems.