invasive aspergillosis (1 is a life-threatening condition in immunocompromised patients. an early diagnosis is of great importance because early treatment may resolve this potentially fatal infection. recently, the polymerase chain reaction (pcr) has been used successfully in detecting specific dna of several pathogen. in this study, nested pcr was used to detect dna specific for a!.pergiflus s...

objectives: salmonella typhimurium is important food-borne pathogen responsible for gastroenteritis. in this work a polymerase chain reaction based enzyme linked immunosorbent assay (pcr-elisa) was developed to identify salmonella typhimurium. materials and methods: the rfb gene which is responsible for biosynthesis of the salmonella o-antigenic lipopolysaccharide was selected as the target s...

Selecting specific primers is crucial for polymerase chain reaction (PCR). Nonspecific primers will bind to unintended genes and result in nonspecific amplicons. MFEprimer is a program for checking the specificity of PCR primers against the background DNA. In this chapter, we introduce: (1) the factors that affect the specificity of primers; (2) the principle of MFEprimer and its settings; (3) ...