Figure 5. Averaged pH values of soils around the CSUB campus (in the center) obtained from the USDA WSS database: pH 7
(light gray) and pH 7.5–8 (darker gray). Different soil types are indicated by soil map unit numbers in white dashed squares: 125
(Granoso loamy sand), 243 (Wasco sandy loam), 127 (Granoso sandy loam), 174 (Kimberlina fine sandy loam), and others outside
our area of interest.
Figure 6. Results of multiplex PCRs indicating the presence of fungi in many soil samples (~600 bp). The pathogen was detected
in some (~220 bp). (A) Coccidioides immitis was detected in sample JCo. (B) The pathogen was detected in samples JC, PS, EJ,
Nora, and KD (PC = positive control, DNA from C. immitis; NC = negative control; not all class data are shown, white arrows point
toward PCR amplicons of correct size).