Los Angeles County West Vector & Vector-Borne Disease Control District

Locations of Lyme Positive Ticks 

    It should be noted that only a few sites have been confirmed as positive.  However, the species of tick, Western Black-Legged tick (Ixodes pacificus),  that carries the bacterium for Lyme Disease has been  found in other areas throughout the District. Western black-legged ticks have been found in 55 of 58 counties in California.  On average, only about 1-2% of the adult Western Black-Legged ticks in California are infected with the bacterium that causes Lyme disease.  In some areas north of the San Francisco Bay Area, up to 5% of the adult ticks and 14% of the nymphal ticks may be infected: this is still much lower than the northeastern U.S. where 30-60% or more of the adult ticks are infected.

Click on the map above to view sites where ticks carrying the bacterium that causes Lyme Disease have been found in the District.


Below are current results for Western Black-legged ticks collected in our district and tested for the bacterium that causes Lyme disease

DATE COLLECTION LOCATION RESULT
12/03/03 Topanga State Park - Dead Horse Trail Negative
12/04/03 Will Rogers State Park - Betty Rogers Trail Negative
12/16/03 Rolling Hills - Bowie Trail Negative
12/16/03 Rolling Hills - Purple Canyon Trail Negative
12/18/03 Malibu Creek State Park - Mott Road Negative
01/07/04 Will Rogers State Park- Betty Rogers Trail Positive
01/07/04 Topanga State Park - Dead Horse Trail Negative
01/15/04 Rolling Hills - Bowie Trail Negative
01/15/04 Rolling Hills - Purple Canyon Trail Negative
01/21/04 Malibu Creek State Park - Mott Road Negative
02/05/04 Topanga State Park - Dead Horse Trail Negative
02/05/04 Will Rogers State Park- Betty Rogers Trail Negative
02/11/04 Rolling Hills - Bowie Trail Negative
02/11/04 Rolling Hills - Purple Canyon Trail Negative
03/03/04 Topanga State Park - Dead Horse Trail Negative
03/04/04 Malibu Creek State Park - Mott Road Negative
03/11/04 Will Rogers State Park - Betty Rogers Trail Negative
03/18/04 Rolling Hills - Bowie Trail Negative
03/18/04 Rolling Hills - Purple Canyon Trail Negative
02/03/05 Rolling Hills - Purple Canyon Trail Positive
03/17/05 Tapia State Park - Spur Trail Positive
12/14/05 Rolling Hills – Bowie Trail Negative
12/14/05 Rolling Hills – Purple Canyon Trail Negative
01/12/06 Rolling Hills Estates – George F. Canyon Trail Negative
01/12/06 Palos Verdes Estates – Bluff Cove Negative
01/18/06 Rolling Hills – Bowie Trail Negative
01/18/06 Rolling Hills – Purple Canyon Trail Negative
01/19/06 Charmlee Park – Botany Trail Negative
01/19/06 Tapia State Park – Spur Trail Negative
01/26/06 Palos Verdes Estates – Bluff Cove Negative
01/26/06 Rolling Hills Estates – George F. Canyon Trail Negative
02/01/06 Charmlee Park – Botany Trail Negative
02/01/06 Tapia State Park – Spur Trail Negative
02/02/06 Rolling Hills – Bowie Trail Negative
02/02/06 Rolling Hills – Purple Canyon Trail Negative
02/15/06 Charmlee Park – Botany Trail Negative
02/15/06 Tapia State Park – Spur Trail Negative
02/16/06 Rolling Hills – Upper Willow Springs Trail Negative
02/16/06 Rolling Hills – Lower Willow Springs Trail Negative
03/02/06 Charmlee Park – Botany Trail Negative
03/02/06 Tapia State Park – Spur Trail Negative
03/09/06 Rolling Hills Estates – George F. Canyon Trail Negative
03/09/06 Rolling Hills – Johns Canyon Trail Negative
03/16/06 Tapia State Park – Spur Trail Negative
03/31/06 Charmlee Park – Botany Trail Negative
03/31/06 Tapia State Park – Spur Trail Negative
01/29/07 Tapia State Park – Spur Trail Negative
02/01/07 Rolling Hills – Bowie Trail Negative
02/01/07 Rolling Hills – Purple Canyon Negative
02/14/07 Topanga State Park – Musch Trail Negative
02/14/07 Topanga State Park – Dead Horse Trail Negative
02/15/07 Malibu Creek State Park – Mott Road Negative
12/13/07 Malibu Creek State Park – Mott Road Negative
12/13/07 Tapia State Park – Spur Trail Negative
01/03/08 Topanga State Park – Musch Trail Negative
01/03/08 Charmlee Park – Botany Trail Negative
01/29/08 Will Rogers State Park – Betty Rogers Trail Negative
01/31/08 Rolling Hills – Purple Canyon Trail Negative
02/01/08 Tapia State Park – Spur Trail Negative
02/01/08 Malibu Creek State Park – Mott Road Negative
02/07/08 Charmlee Park – Botany Trail Negative
02/07/08 Topanga State Park – Musch Trail Negative
02/08/08 Will Rogers State Park – Betty Rogers Trail Negative
02/19/08 Rolling Hills Estates – George F. Canyon Trail Negative

   

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