Table 1.

Number of strains isolated for each sampling date, the percentage of survival and number of strains genotyped for the study

Year of sampling	Sampling date	Number of cells isolated	Percentage of survival	Number of strains genotyped
2008	1 October	12	75	4
	10 October	24	58	6
	14 October	48	40	10
	24 October	48	44	7
2009	17 April	90	57	19
	5 May	69	42	10
	28 May	69	38	20
	18 June	89	37	13
	16 July	72	49	19
	30 July	72	54	19
	24 August	96	52	20
	9 September	96	43	20
	1 October	95	21	15