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.
The risk of mumps for travelers is high in many countries of the world, including industrialized countries, such as the United Kingdom, which has had several outbreaks since 2004, and Japan, which does not routinely vaccinate against mumps.owever, mumps can occasionally cause complications, such as swelling of the brain, testicles (in males), and ovaries and breasts (in females), and temporary or permanent deafness.