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Long-term non-progressors (LTNP) represent a minority (1–5%) of HIV-infected individuals characterized by documented infection for more than 7–10 years, a stable CD4+ T cell count over 500/mm 3 and low viremia in the absence of antiretroviral treatment. Protective factors described so far such as the CCR5delta32 deletion, protective HLA alleles, or defective viruses fail to fully explain the...
The LEE 4 genes sepL, espA, espD, espB, and espF were detected in 50 strains of typical and atypical enteropathogenic (EPEC) and enterohemorrhagic (EHEC) Escherichia coli by PCR. sepL was amplified in 90%, espA in 94%, espB in 50%, espD in 40%, and espF in 78% of all strains, employing prototype EPEC-based primers. With O26:H-based primers, espB was detected in all O26 strains, and O157:H7-specific...
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