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 caused by a virus that is passed from one person to another through saliva, nasal secretions, and close personal contact. The condition primarily affects the parotid glands.Parotid glands âalso called salivary glandsâare the organs responsible for producing saliva.umps is caused by a virus that is passed from one person to another through saliva, nasal secretions, and close personal contact. The condition primarily affects the parotid glands.