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.
If you are an adult and have suffered from chronic hives your whole life, you may want to have your blood checked for these issues or other related conditions. What Causes Hives in Adults-The Food You Consume: We also know that the food you eat might be the culprit of an adult hives breakout.hat Causes Hives in Adults-The Immune System: What we do know is that hives in adults has a great deal to do with the immune system.