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Research links some headaches to common germ

Saturday, April 27, 2002

MILAN, Italy -- Some headaches may be linked to infection with a common bug and daily doses of friendly bacteria could ward them off, preliminary research suggests.

A study presented Friday at an infectious diseases conference found that about 18 percent of chronic migraine sufferers were infected with the stomach bug helicobacter pylori and antibiotics appeared to clear the headaches.

Adding the friendly bacteria Lactobacillus seemed to work even better, leaving most people migraine-free for a year and lessening the intensity and frequency of recurring headaches in the others, the lead researcher said.

Experts were cautiously receptive to the idea but said the findings were too tentative to draw any firm conclusions.

Helicobacter pylori, the bug that causes gut ulcers, has recently been linked to a growing list of diseases, including heart disease, autoimmune diseases and skin conditions.

In the study, Italian scientists divided 130 patients who had migraines and were infected with helicobacter pylori into two groups.

One group was given a three-week course of antibiotics and the other got the three weeks of antibiotics plus Lactobacillus, a friendly bacteria, or probiotic, found in yogurt and other dairy products. The probiotic group took three Lactobacillus doses a day for three months, then dropped their intake to one dose a day for the next nine months.

A year's difference

One month after starting treatment, both groups were similar in terms of headache symptoms and bacteria colonization.

However, after one year, significant differences were found, said the study's leader, Dr. Maria Gismondo, head of the clinical microbiology laboratory at the University of Milan.

"We found that eradication of headache and bacteria was more significant in the group treated with antibiotics and Lactobacillus, and relapse in the people who took Lactobacillus was very low, but not in the people not getting Lactobacillus therapy," she said.

At the end of the year, 50 percent of the people who got the antibiotics alone were still getting migraines. That compared with 20 percent in the group who took the probiotics for a year.

Headaches in the probiotic group occurred less often, were milder and went away more quickly than they did in the antibiotics group.

The infection findings were similar. After a year, the bacteria were 40 percent fewer in the group who took antibiotics and 70 percent fewer in the group getting the combination treatment.

However, headache expert Dr. Peter Goadsby, professor of clinical neurology at the Institute of Neurology and the National Hospital for Neurology and Neurosurgery in London, reserved judgment.

He said the fact that the study did not involve a group getting dummy pills makes the findings less reliable. The study cannot rule out the "placebo effect."


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