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Occurrence of Salmonella typhi and Salmonella paratyphi in Jordan.

In order to justify the surveillance control system and hygiene policy in Jordan, this study evaluated the occurrence of diarrhoea during the period 1988-2000, focusing on cases caused by Salmonella typhi and Salmonella paratyphi. From January 1988 to December 2000, the number of notified diarrhoeal cases by the Ministry of Health in Jordan was 1,399,563 million. Other groups of patients confined to the Governorate of Amman was diagnosed at Al-Battikhi Medical Laboratories. One-way ANOVA and Least Significant Difference (LSD) were carried out for statistical analysis. The number of reported diarrhea cases was 1,399,563, 53.0% were males, and 47.0% were females, among them, 80.3% were < 20 years and 19.7%, were > 20 years. Out of 245,255 patients tested for S. typhi and S. pararyphi, positive stool culture were 1992 (0.6%). Out of these, 960 (48.2%) were males and 1,032 (51.8%) were females (P = 0.028). The highest incidence rate (10.8) was observed in the year 1993, while the lowest incidence rate (0.9) was found in year 2000. A significant difference (P < 0.001) was found between the number of S. typhi and S. Paratyphi cases and year. The seasonal variation was also found to be significant (P < 0.0001), with the summer period showing the highest incident rate. A significant difference (P < 0.001) was observed between number of typhoid and paratyphoid cases and districts. A significance difference between number of typhoid and paratyphoid cases with age and sex. The group most affected was school age and adolescence. The demographic situation plays an important role in reporting typhoid and paratyphoid cases, where there might be an urgent indication for a better surveillance control system on water resources and disposal systems. S. typhi and S. paratyphi antibiotics resistance pattern showed they were resistant to tetracycline (56.0%, 58.0%), ampicillin (45.0%, 48.0%), trimethoprim (43.0%, 47.0%), cephtazidime (12.0%, 13.5%) chloramphenicol (6.8%, 7.2%), gentamycin (3.0%, 4.0%) neomycin (2.1. 1.8%), calvulanic acid (augmentin (1.4%, 2.2%) and norofloxacin (0.92%, 1.1%). Susceptibility to amikacin, ciprofloxacin, cetfriaxone, ofloxacine, imepenim, cefixime and cefotaxime was 100.0%. The increase in percentage of antibiotic resistant strain might indicate a need for a further prescribing policy for treatment.