West Nile Virus

Alvarado ISD West Nile Virus Prevention Plan & Mosquito Control
West Nile Virus has been found in birds, horses and humans in Johnson County. Generally, there
is not much that we can add to the information provided by the public health authorities CDC's
Fact Sheet, http://tinyurl.com/64d85 as to risk or current status. Many warm-blooded animals
(birds and mammals) can be infected with the West Nile Virus (WNV). WNV is transmitted by
most mosquito species. These facts make WNV a more significant problem than other mosquitoborne
diseases in our area. For example, St. Louis Encephalitis is infectious to birds, horses and
humans but is carried by one type of mosquito that is rarely active during daylight hours. Malaria
is infectious only to humans and is also transmitted by a single type of mosquito. The broad range
of mosquitoes that can transmit WNV increases the importance of controlling mosquito breeding

Alvarado ISD is severely limited in what we can do to respond to the existence of the virus in our
area. State law restricts the District's use of pesticides in and around schools.

Parents who are concerned about the West Nile Virus may:
1. Use mosquito repellant sprays or lotions on your child before he/she leaves for school.
2. Send a properly labeled mosquito repellant LOTION (not a spray) to school with your
child. It is your responsibility to teach your child how and when to apply the LOTION.
Sprays are not permitted at school for the safety of all students and staff!

Alvarado ISD is:

  • Eliminating mosquito breeding areas around its schools.
  • .
  • Mowing regularly.
  • Treating detention ponds.
  • Monitoring the situation very closely.

Alvarado ISD has implemented the following mosquito control measures:
1. Thorough cleaning of all school grounds.
2. Careful stacking and neat storage of materials at and around construction sites to provide
good air movement that will reduce daytime locations for the mosquitoes.
3. Filling low spots that do not drain well.
4. Treating the standing water in locations that can not be drained with BT (a bacteria that
prevents mosquito eggs from developing).
5. More careful use and control of watering for landscape purposes.
6. Procedures for how to handle dead birds.
7. Distribution to staff of guidelines for insect repellent use.

Data and tips taken from the US CDC's SAFE program.

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