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 a disease caused by a virus that usually spreads through saliva (spit). It can infect many parts of the body, especially the parotid salivary glands. These glands, which make saliva for the mouth, are found toward the back of each cheek, in the area between the ear and jaw.