Get Off Those Maliciously Loaded Scripts!
Download this free Anti-Malware Plugin for WordPress.

If you quarantined the threats then you may just need to request a review in Google Webmaster tools. It will take a little while before the search results are re-indexed to reflect the changes you have made. You don’t need to delete the quarantine records, but if google comes back and says there is still malware on the site or the site is still actively redirecting then you need to keep looking for more threats.