When monocyte isolation, cell culture methods, medium and virus are all strictly controlled, remaining variation in HIV-1 replication observed in MDM from different donors can be assumed to be primarily of genetic origin.
Comparison of the results obtained by different diagnostic methods (ELISAs and virus microneutralisation tests) is presented in Table 1.
Nowadays, viral AGE is more frequently acknowledged, due partly to improved diagnostic methods and new virus variants, e.g., norovirus subtypes showing epidemic spread, as well as an increase in the number of outbreaks [ 17– 17].
To generate the former, the canonical HIV strain NL4-3 [22] was produced using our previously published transfection method [23], and virus was collected after a propagation step.
A systematic search for bacteria with standard methods and for viruses with sensitive methods (i.e., PCR and RT-PCR methods), as reported elsewhere [ 6, 12, 14- 16] were performed.
Methods for cell culture and virus growth have been previously described (11 – 13 ), and standard laboratory precautions within biosafety level 3 facilities were undertaken to prevent cross-contamination of strains.
Delivery systems can be categorized into physical methods, conjugation methods, and natural carrier (viruses and bacteria) and nonviral carrier methods [ 8].
The differences in specimens sampled, selection of subjects, and virus identification methods, as well as the climate, geography, crowding, and socio-economic status factors could also lead to the differences in the positive rate between our study and others.
The strengths of our study include its prospective design in a family setting and its use of various methods, including 2 PCR assays and virus culture, to detect pandemic (H1N1) 2009.
