1 There are large areas of tundra in northern North America, northern Europe, and northern Asia. 2  The word tundra comes from a Finnish word tunturi, which means treeless plain or barren land. 3  The tundra is a very fragile biome that is shrinking as the permafrost melts. There are large areas of tundra in northern North America, northern Europe, and northern Asia. 2  The word tundra comes from a Finnish word tunturi, which means treeless plain or barren land. 3  The tundra is a very fragile biome that is shrinking as the permafrost melts.
Although the CDC states that pregnant women are 20 times more likely to become infected than non-pregnant healthy adults, the number of cases of listeriosis in pregnant women is about 17% . Symptoms of listeriosis may show up 2-30 days after exposure. Symptoms in pregnant women include mild flu-like symptoms, headaches, muscle aches, fever, nausea, and vomiting. If the infection spreads to the nervous system it can cause stiff neck, disorientation, or convulsions.
1 Nausea and vomiting, sometimes known as  morning sickness  typically begins in the 2nd to 8th week of pregnancy. 2  Other possible early pregnancy symptoms are mood swings, fatigue, changes in skin pigmentation, frequent urination, and headache. Not all women will experience the same symptoms in early pregnancy or experience these symptoms to the same degree. 2  Feelings of breast swelling, tenderness, or pain are also commonly associated with early pregnancy. 3  There is usually only a small amount of weight gain in the first trimester of pregnancy.