Table 2. Temporal variation in frequency of bacterial taxa in individual adult D. melanogaster.
| Taxon-specific PCR assay |
Strain ZH26 (10 flies per sample) |
Strain Canton-S (10 flies per sample) |
||||||
|---|---|---|---|---|---|---|---|---|
|
Number of flies positive for bacterium |
X2 (2 df) |
Number of flies positive for bacterium |
X2 (2 df) | |||||
| Feb 2011 (time-0) | Nov 2011 (9 months) | Apr 2012 (12 months) | May 2010 (time-0) | Feb 2011 (9 months) | Feb 2012 (21 months) | |||
| A. pomorum | 0 | 10 | 10 | 10, P=0.007a | 10 | 10 | 6 | 1.23, P=0.54 |
| A. tropicalis | 0 | 10 | 10 | 10, P=0.007a | 10 | 4 | 10 | 3, P=0.223 |
| L. brevis | 0 | 10 | 0 | 20, P<0.001a | 10 | 5 | 0 | 10, P=0.007a |
| L. fructivorans | 10 | 10 | 10 | 0, P=1 | 9 | 10 | 9 | 0.07, P=0.966 |
| L. plantarum | 0 | 10 | 0 | 20, P<0.001a | 10 | 9 | 0 | 10, P=0.007a |
a
Significant after Bonferroni correction for five samples (critical probability=0.01).