We have sequenced different genes of HIV-1 strains from infected individuals recruited in various geographic parts of Algeria; phylogenetic trees were constructed yielding molecular characterization of these strains. Subtype B accounts for 56% of the samples studied and is therefore the predominant subtype, particularly in the north part of the country; but there is a high diversity of the virus including CRF02_AG, CRF06_cpx, CRF02/CRF06 interrecombinants, and different other intersubtype and/or inter-CRF recombinants. The prevalence of these non-B viruses increases in the south part of Algeria that borders sub-Saharan African countries. The high diversity of HIV-1 in Algeria has implications for virological follow-up, resistance surveys, and vaccine design.

This study demonstrates for the first time HIV-1 resistance mutations to all classes of antiretroviral drugs available in Algeria (NRTIs, NNRTIs, PIs) in treated patients at failure. Moreover, it is shown that mutations to NRTIs and PIs can be observed in untreated patients in this country where there is high HIV-1 diversity.

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The efficacy and safety of pefloxacin 400 mg twice daily for seven days in the treatment of typhoid fever was investigated in an open, non-comparative study involving 37 patients infected with Salmonella typhi. Between day 5 and the end of treatment, all patients showed clinical improvement. The clinical cure rate at the end of the treatment period was 89.2%. One month after the end of treatment, the final assessment showed a clinical cure rate of 94.6% with relapses occurring in only two patients. Both these patients belonged to the group with negative blood cultures but positive serodiagnostic tests. Bacteriological tests confirmed eradication of the pathogen in 94.6% of patients and the relapses in the two serologically positive patients. Temperature became normal in a mean of 5.14 days. Clinical adverse reactions were reported in 5.9% (3/51) of patients (vomiting in two, transient pruritic rash in one). The results of this study indicate that a seven-day course of pefloxacin 400 mg twice daily provides a suitable alternative in the treatment of typhoid fever.

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