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BACKGROUND: Blood transfusion is a life-saving procedure; millions of lives are saved each year. However, blood transfusions are associated with certain risks that can lead to adverse consequences. This study aimed to survey the prevalence and trend of hepatitis B virus (HBV), hepatitis C virus (HCV), and Human immunodeficiency virus (HIV) among blood donors of Fars province, Iran (2006-2018).METHODS: This retrospective cross-sectional study was conducted by reviewing the records of the blood transfusion organization of Fars province. A total of 1952478 blood units were screened for transfusion-transmitted infections (TTIs). Then, data were entered into SPSS software (Negare. version 25). Chi-square test was used to compare the sof TTIs among blood donors. Chisquare test for trend was used to analyze the variations in trends of TTIs during this period. Finally, p-values less than 0.05 were considered statistically significant. GraphPad Prism software was used for the depiction of the graphs.RESULTS: Among the 1952478 blood donations within the 13-years, 4479(0.229 %) of donors were HBsAg, HCV Ab, and HIV Ag-Ab positive. The seroprevalence of HBV, HCV, and HIV was 2684(0.137%), 1703(0.087 %), and 92(0.0047%), respectively.CONCLUSION: The current study showed that the overall prevalence of TTIs among blood donors was low and had a descending trend over the years of study.

The principle purpose of agriculture land use feasibility is to predict the potentials and limitations of land for plant production. The present study provides a model to assess land suitability for cultivation of saffron (Crocus sativus L.) in Azadshahr Township, located in the north of Iran. The goal is to provide a special methodological approach to assess land use suitability for saffron cultivation in Iran and other similar regions. This suitability model integrated the perspectives of local saffron experts using an analytic hierarchy process (AHP) from Multi-Criteria Analysis (MCA) to determine the criteria weights such as climate, soil, and topographic used in land use suitability analysis. In the present model, 21 ecological variables were selected for saffron land suitability analysis and thematic maps were developed for each of the parameters in Geographic Information System (GIS).The results showed that the soil and climatic variables have a major role in the development of saffron cultivation. The final land suitability map indicated that the most suitable areas (1743.25 ha) for growing saffron were located in the south and east of Azadshahr township. Also, the largest parts of this region were classified as currently unsuitable (8543.72 ha) and permanently unsuitable (12,450.64 ha) zones. These classes were located in the northern, central and northeastern parts of Azadshahr. The results highlighted that these areas face with limitations for development of saffron cultivation. According to this result, the main limiting features in these classes were high rainfall in the reproductive stage of saffron (25–0 mm), inappropriate slope (12%