EEE – spraying now not effective


Email from Mike Sullivan today to a resident asking for spraying –

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I did speak at length Thursday night with John Smith, who is head of Norfolk
County Mosquito control. He advised me that Medfield is consider at low risk
for EEE or Nile virus, on the state Dept of Health web site map. I’ll forward the email I received from him so you can check it out. He also told me that although they could spray, It wouldn’t do any good this time of year as the nights are too cool, so the spraying wouldn’t be effective. The mosquito that tested positive in Sherborn was a type of mosquito that bites birds, but not humans. When Norfolk County does their weekly testing, they will sample for the type of mosquito that bites humans. So far, the nearest place where that type of mosquito has been infected is in Sharon. There have found a bird biting mosquito in Medway that was infected, but not a human biting mosquito They are closely monitoring the situation and will advise our Board of Health or any change in test results. In the meantime, Mr. Smith advises that the most effective protective measures to prevent infection this late in the season are to wear long sleeve shirts and pants, to put insecticides on exposed areas and to the extent possible to avoid going out in heavily wooded areas from dusk to dawn. Keep in mind that Medfield is still considered a low-risk area for infection. Also, Mr. Smith pointed out that the reason for the increase in the number of mosquitos recently is the increase in the water levels in the Charles River caused by the heavy rains from tropical storm Irene. The Charles River is slow to rise
and slow to fall, so the high water levels will continue for some time. Over the years the Norfolk County Mosquito Control has be very effective in monitoring mosquito populations and in preventing the spread of disease. I think the best course of action at this time is to follow their recommendations.  Mike Sullivan

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