Approximately 560,000 websites – and 5.5 million webpages on those sites – were infected with malware during the fourth quarter of 2009,  according to data gathered by web anti-malware vendor Dasient. These numbers represent a decrease from Q3 of 2009, when 640,000 websites and 5.8 million webpages were infected. During Q4, however, malware infections spread to a greater number of pages on each site compared to Q3. Newly infected sites with at least 10 pages had malware on an average of 23 percent of pages, up from 19 percent in the previous quarter. – AM