Backgrond & Objective: In recent years, malaria has been a serious problem in Parsabad (a north-western town in Iran). A lot of health-care funding has been allocated to malaria campaign program in this area. The objective of this study was to investigate clinical epidemiology of malaria during 1999-2000.

 Methods: The data collected through epidemiology forms filled for 509 malaria positive cases during 1999- 2000 was analyzed by EPI2000 software. Frequency tables, X² test and one way ANOVA were used in this analysis.

 Results: All 509 Malaria cases diagnosed were P vivax. They belonged to the first seven-month of the year. 69.4% of malaria cases were related to the year 2000 and the others were related to 1999. The most frequent symptoms were chills in 488 cases (95.9%) and fever in 481 of them (94.5%). Sweating was found only in 3.9% of the reported cases. Mean age and standard deviation of patients was 22.9 + 15.6. There was no significant difference between men and women in terms of the distribution of fever and chills.

 Conclusions: The high prevalence of fever and chills was compatible with the findings of previous studies. If one of the two symptoms is positive in the residents of this area or those people traveling there, malaria should be suspected.

  Background & Objectives : More than one hundred countries face the problem of malaria disease. Studies have indicated that thalassemic individuals are relatively more resistant to malaria. The present research set out to investigate this hypothesis in Iraushahr where these is a high prevalence of moralia. The goal of this study is to compare the prevalence of malaria in thalassemic individuals with non- thalassemic ones in Iranshahr.

  Methods: In this case-control study 100 thalassemic individuals (case) and 100 non-thalassemic case (control) were selected. In addition to serum specimen, their blood sample from their fingertips were also taken to prepare peripheral blood smear. The tests were performed on 200 random samples in July (the peak time of malaria transmission). In this study, both indirect immuno flurecance Assay (IFA) and direct amear technique were used. The data were analyzed in SPSS software using descriptive and analytical statistics including T- test, chi-square and ANOVA.

  Results: In IFA 20 subjects had positive titer while 80 ones had negative titer. Direct microscopic examination indicated that these, 20 cases had malaria parasite, 10 of whom were affected by p. vivax and 10 whit p. falciparum. In the non-thalassemic people (control group), 75 subjects had positive titers and 25 had negative titer. With respect to the direct smear anamination in non-thalassemic subjects, 18 had malaria parasite, of whom 7 had p.falsiparium and 11 had vivax. The results of malaria antibody titer indicated that the history of being affected by malaria the thalassemic subjects was 92% less than the non-thalassemic ones and this difference was statistically, significant (p<0.05) however, no significant relationship was found in terms of the results of direct microscopic examination and Ginsastaining.

  Conclusion : Since thalassemic people are more resistant againt malaria futhure researches are required to investigated the resistance to malaria in other blood disorders.