2010a-499 biologicalfactors biologicalproducts biologicalstandardization congresses diagnosis diagnostic diagnostictechniquesandprocedures drugs drugtherapy evaluation immunologicfactors laboratory malaria microbiology parasiteantigens plasmodium qw800 rapidmethods(microbiology) referencestandards sensitivityandspecificity standardization standards statistics testing wc750m236852009 worldhealth