Skip to main content

Table 1 Summary of positive black flies according to their year and collection sites

From: Presence of a cryptic Onchocerca species in black flies of northern California, USA

 

Number examined

Number of pools

Positive black fly pools

Coordinates

Location

Percentage of positive pools by species (%)

2015

      

 S. clarum “black”

5

3

(1) SCB-15-039

38°53′21.9′′N, 122°43′53.6′′W

Kelseyville

33.3

 S. clarum “orange”

6

6

None

0.0

 S. tescorum

57

17

(1) ST-15-010

38°43′16.7′′N, 122°37′12.8′′W

Middletown

5.9

 S. vittatum

82

31

(1) SV-15-020A

38°55′3.8′′N, 122°35′20.9′′W

Lower Lake

6.5

   

(2) SV-15-043

38°55′3.8′′N, 122°35′20.9′′W

Lower Lake

 

Total

150

57

4

  

7.0

2016

      

 S. clarum “black”

11

10

None

 S. clarum “orange”

7

7

None

 S. tescorum

101

23

(1) ST-16-011

38°56′49.5′′N, 122°54′14.3′′W

Lakeport

8.7

   

(2) ST-16-014

38°55′10.2′′N, 122°46′35.5′′W

Kelseyville

 

 S. vittatum

220

49

(1) SV-16-030A

38°55′19.1′′N, 122°37′35.0′′W

Lower Lake

2.0

Total

335

89

3

  

3.4

2015–2016

      

 S. clarum “black”

16

13

1

7.7

 S. clarum “orange”

13

13

0

0.0

 S. tescorum

158

40

3

7.5

 S. vittatum

302

80

3

3.8

Overall total

485

146

7

  

4.8

  1. Black flies were collected in the 2015–2016 field season using CO2 -baited traps in the Lake County, California area. Four species of black flies were caught: S. clarum (black); S. clarum (orange) S. tescorum; and S. vittatum. However, S. clarum (orange) had no positive individuals. Each row denotes the number of black flies examined, the number of pools (n =  ≤ 10), the positive black fly pools, coordinates and cities of where the positive was located, and the percentage of positive pools by species