ABSTRACT
Background: Parathyroid hypofunction is one the endocrinopathies affecting patients with ?-thalassemia major [TM], while parathyroid hyperfunction is not well assessed. In this study, we aimed to evaluate the prevalence of parathyroid dysfunction in children with thalassemia major and to study its relation to age, gender, splenic status, serum calcium and ferritin. Study Sesign: In 70 children with TM /[41 [58.6%] males and 29 [41.4%] females with mean age 14.8+/-2.9 years; range 6-18 years/]; serum levels of intact pa rathormone [iPTH], calcium, phosphorus and alkaline phosphatase were measured. liver iron content was assessed in 42 cases with magnetic resonance imaging by means of T2*. Average serum ferritin was calculated for 1 year prior to the study. Results: Mean iPTH and serum phosphorus were within normal range. Mean calcium was below the lower limit of normal range. Seventy-three percent had normal parathyroid function with 3 [4.3%] had borderline iPTH. The prevalence of parathyroid dysfunction was evident in 27% cases. Thirteen [18.5%] had low iPTH and 6 [8.6%] cases had elevated iPTH levels. Forty-three [61.4%] cases had hypocalcemiaand5 cases [7.1%] had hyperphosphatemia. Age above 12 years, sex, splenectomy, hypocalecemia, serum ferritin above 1500 ng/ml and being not chelated were not proved to be risk factors of parathyroid dysfunction. There is a good correlation between serum ferritin and liver iron concentation [LIC] [r=0.5, p=0.001]. No correlations were found between PTH and age, frequency of blood transfusion, serum ferritin, serum calcium, phosphorus or alkaline phosphatase. Conclusion: Parathyroid dysfunction is common in patients with ?-thalassemia major and worth screening in early childhood even in the absence of hypocalcemia or iron overload. This might be the first step towards decreasing its prevalence among TM population. In addition, the onset and dose of calcium and vitamin D supplementation in pediatric patients with ß-thalassemia major should be re-evaluated
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the prevalence of kanamycin (kan) and ampicillin (amp) resistant bacteria in public drinking water.</p><p><b>METHODS</b>Bacteria containing kan and amp resistant genes were amplified by PCR and further characterized by colony hybridization and transformation studies. The genus of kan and amp resistant bacteria was determined with standard methods.</p><p><b>RESULTS</b>Among the 625 drinking water samples, 400 contained kan and amp resistant bacteria and the percentage was 42.5% and 57.5%, respectively, which was further confirmed by the amplification of a 810 bp kan resistant gene and a 850 bp amp resistant gene. Of the 170 kan resistant bacteria, 90 were Gram negative and 80 were Gram positive. Of the 230 amp resistant bacteria, 160 were Gram negative while 70 were Gram positive. Salmonella, Shigella, Staphylococcus, Streptococcus, and E.coli were detected as 13%, 11%, 17%, 30%, and 29%, respectively. Bacterial strain DH5alpha transformed with plasmids isolated from kan and amp resistant bacteria confirmed that the antibiotic resistant genes were mediated by plasmids.</p><p><b>CONCLUSION</b>Drinking water is contaminated with kan and amp resistant bacteria due to poor sanitary conditions.</p>