ABSTRACT
Bacterial bloodstream infections are a major public health problem, which leads to high morbidity and mortality of patients. On time diagnosis and appropriate medication will be the best way to save the lives of affected ones. The aim of the present study was to determine the bacterial profile of bloodstream infections and their antibiotic susceptibility pattern in Mekelle Hospital. Cross sectional study method was carried out in 514 (269 females and 245 males) febrile patients in Mekelle hospital from March to October 2014. Standard bacteriological methods were used for blood collection, bacterial isolation and antimicrobial susceptibility pattern. Out of the total 514 febrile patients, 144 (28%) culture positive were isolated. Staphylococcus aureus 54 (37.5%), Coagulase-negative staphylococci 44 (30.6%), Escherichia coli 16 (3.1%), Citrobacter spp. 9 (1.7%) and Salmonella typhi 8 (1.6%) were the most dominant isolates, collectively accounting for >90% of the isolates. Antimicrobial resistance pattern for gram positive and gram negative bacteria was 0-83.3% and 0-100%, respectively. High resistance was seen to Trimethoprim-sulphamethoxazole 101 (70.1%), Oxacillin 65 (62.5%), Ceftriaxone 79 (58.9%) and Doxycycline 71 (49.3%). Fifty-nine percent of the isolated bacteria in this study were multi drug resistant. Most bacterial isolates were sensitive to Gentamicin, Ciprofloxacin and Amoxicillin clavulanic acid. All gram positive isolates in this current study were sensitive to vancomycin. Prevalence of bacterial isolates in blood was high. It also reveals isolated bacteria species developed multi drug resistance to most of the antibiotics tested, which highlights for periodic surveillance of etiologic agent, antibiotic susceptibility to prevent further emergence and spread of resistant bacterial pathogens.
ABSTRACT
OBJECTIVE: To determine diagnostic value of the Widal test, treatment pattern of febrile patients and antimicrobial drug susceptibility pattern of blood isolates. METHODS: Using cross sectional methods, blood samples were collected for culture and Widal test from 502 febrile outpatients attending Mekelle hospital and Mekelle health center with similar symptoms to typhoid. Sensitivity, specificity for anti-TH and anti-TO titers using culture confirmed typhoid fever cases, and Kappa agreement between Titer and slide Widal tests were calculated. Treatment pattern of patients and antimicrobial susceptibility pattern of the blood isolates was assessed. RESULTS: From the 502 febrile patients, 8(1.6%) of them had culture-proven typhoid fever. However, patients who have results indicative of recent infection by O and H antigens of the Widal slide agglutination test were 343 (68.5%), with specificity and sensitivity of 33% and 100%, respectively. Over prescription of antibiotics was seen by Widal slide test for Ciprofloxacin 268 (76.1%), Amoxicillin- Clavulanic acid 9(2.6%), Amoxicillin 8(2.4%) and Chloranphenicol 8(2.4%). Tube titer positivity was seen in 23(5.3%) patients with 75% sensitivity and 95.8% specificity. Widal slide and Tube titer tests showed poor agreement for both antigens (kappa=0.02 for O) and (Kappa=0.09 for H). A single anti-TH titer of ≥ 1:160 and anti-TO titer ≥ 1:80 higher in our study showed an indication for typhoid fever infection. Drug resistance pattern of blood isolates ranges from 0-89.7% for gram positive and 0-100% for Gram negative, with an overall multi-drug resistance rate of 61.7%. CONCLUSION: Patients were wrongly diagnosed and treated for typhoid fever by Widal test. The tube titration method was relatively good but still had poor sensitivity. Blood isolates showed multi drug resistance, which may be due to the indiscriminate prescription as seen in this study. Based on our results, the slide Widal test is not helpful in the diagnosis of typhoid, hence other tests with rapid, feasible, better sensitivity and specificity are urgently needed in Ethiopia.
