Table: Laboratory confirmed cases of Pertussis infection England and Wales, by quarter 2002-2008

Laboratory confirmed cases of Pertussis infection England and Wales,
by quarter 2002-2008

Year and Quarter	PCR and/or serology only	Culture	Total	PCR/serology reports as a %of total
2002-1	13	58	73	18%
2002-2	51	71	126	42%
2002-3	44	71	121	38%
2002-4	18	27	48	40%
2002 Total	126	227	353	36%
2003-1	8	16	23	35%
2003-2	15	35	48	31%
2003-3	34	59	90	38%
2003-4	37	19	52	71%
2003 Total	94	119	213	44%
2004-1	9	13	22	41%
2004-2	54	33	87	62%
2004-3	50	48	98	51%
2004-4	44	37	81	54%
2004 Total	157	131	288	55%
2005-1	34	46	79	43%
2005-2	40	39	77	52%
2005-3	72	80	149	48%
2005-4	51	33	80	64%
2005 Total	197	188	385	51%
2006-1	30	24	54	56%
2006-2	31	23	54	57%
2006-3	163	37	200	82%
2006-4	82	21	103	80%
2006 Total	306	105	411	75%
2007-1	79	14	93	85%
2007-2	109	24	133	82%
2007-3	171	45	216	79%
2007-4	156	21	177	88%
2007 Total	515	104	619	83%
2008-1	139	37	176	79%
2008-2	195	51	246	79%
2008-3	231	72	303	76%
2008-4	168	9	177	95%
2008 Total	733	169	902	81%

*All 2008 data are provisional.
The apparent increase in number of laboratory confirmed cases corresponds with the availability of enhanced diagnostic methods; since mid-2006 there has been greater awareness and use of these testing methods compared to previous years, as illustrated by the increasing proportion of reports diagnosed by PCR and or serology.

Last reviewed: 19 February 2010