Recent Journal Articles by Dereje Habte

Our objective was to demonstrate the feasibility of integrated care for TB, HIV and diabetes mellitus (DM) in a pilot project in Ethiopia. Of 3439 study participants, 888 were patients with DM, 439 patients with TB and 2112 from HIV clinics. Tri-directional screening was feasible for detecting and managing previously undiagnosed TB and DM.

The objective of this study was to assess the feasibility and effectiveness of the nationally approved ambulatory service delivery model for MDR-TB treatment in two regions of Ethiopia. We used routinely reported data to describe the process and outcomes of implementing an ambulatory model for MDR-TB services in a resource-limited setting. Between 2012 and 2015, the number of MDR-TB treatment-initiating centers increased from 1 to 23. The number of sputum samples tested for MDR-TB increased 20-fold, from 662 to 14,361 per year. The backlog of patients on waiting lists was cleared. The cumulative number of MDR-TB patients put on treatment increased from 56 to 790, and the treatment success rate was 75%. Rapid expansion of the ambulatory model of MDR-TB care was feasible and achieved a high treatment success rate in two regions of Ethiopia.

Vitamin D is a fat-soluble vitamin that increases immunity against tuberculosis (TB), decreases the re-activation of latent TB and reduces the severity of active TB disease. Epidemiological studies on the prevalence of vitamin D deficiency and its association with TB have shown inconsistent results in different countries. This study aimed to determine the prevalence of vitamin D deficiency and its association with TB in Northwest Ethiopia. A case–control study was conducted among smear positive pulmonary TB patients and their household contacts without symptoms suggestive of TB. Study participants were recruited at 11 TB diagnostic health facilities in North and South Gondar zones of Amhara region between May 2013 and April 2015. Vitamin D deficiency is highly prevalent among TB patients and non-TB controls in Ethiopia, where there is year-round abundant sunshine. Study participants with TB, females, older age groups, and urban residents had significantly higher prevalence of vitamin D deficiency. These findings warrant further studies to investigate the role of vitamin D supplementation in the prevention and treatment of TB in high TB burden countries like Ethiopia.

Abstract Visual loss is a rare but potentially devastating postoperative complication of prone spinal surgery with a reported incidence of 0.017 to 0.1 percent. We present a case of post-operative bilateral visual loss in a patient who had a laminectomy in prone position under general anesthesia. A 17-year-old male patient with large syringomyelia extending from C2 - T2 level had a surgical procedure done under general anesthesia in prone position that lasted four hours. After the surgical procedure, the patient presented to the Ophthalmology Clinic of Princess Marina Hospital, with a complaint of visual loss of the right eye followed by left, of one week duration. The patient never had a visual impairment in the past. Physical examination, fundal examination and CT scan revealed no primary cause for the visual loss. In this patient the absence of any finding in the optic disc and the retina and the normal CT scan, suggests that the most likely diagnosis is posterior ischemic optic neuropathy. The patient was treated with prednisolone tablet daily and showed mild improvement in vision.

To determine the yield and determinants of retrospective TB contact investigation in selected zones in Ethiopia, we conducted a community-based cross-sectional study during June-October 2014.Trained lay providers performed symptom screening for close contacts of index cases with all types of TB registered for anti-TB treatment within the last three years. Of 272,441 close contacts of 47, 021 index cases screened, 13,886 and 2, 091 had presumptive and active TB respectively. The yield of active TB was thus 768/100, 000, contributing 25.4% of the 7,954 TB cases reported from the study zones over the study period. The yield of retrospective contact investigation was about six times the case notification in the study zones, contributing a fourth of all TB cases notified over the same period. The yield was highest among workplace contacts and in those with recent past history of contact. Retrospective contact screening can serve as additional strategy to identify high risk groups not addressed through currently recommended screening approaches.

The objective of this study was to compare the diagnostic yield of GeneXpert MTB/RIF with Ziehl-Neelson (ZN) sputum smear microscopy among index TB cases and their household contacts. A cross sectional study was conducted among sputum smear positive index TB cases and their household contacts in Northern Ethiopia. Results: Of 353 contacts screened, 41 (11%) were found to have presumptive TB. GeneXpert test done among 39 presumptive TB cases diagnosed 14 (35.9%) cases of TB (one being rifampicin resistant), whereas the number of TB cases diagnosed by microscopy was only 5 (12.8%): a 64.3% increased positivity rate by GeneXpert versus ZN microscopy. The number needed to screen and number needed to test to diagnose a single case of TB was significantly lower with the use of GeneXpert than ZN microscopy. Of 119 index TB cases, GeneXpert test revealed that 106 (89.1%) and 5 (4.2%) were positive for rifampicin sensitive and rifampicin resistant TB, respectively. GeneXpert test led to increased TB case detection among household contacts in addition to its advantage in the diagnosis of Rifampicin resistance among contacts and index TB cases. There should be a consideration in using GeneXpert MTB/RIF as a point of care TB testing tool among high risk groups.

SETTING: Amhara and Oromia Regions, Ethiopia.OBJECTIVE: To determine trends in case notification rates (CNRs) among new tuberculosis (TB) cases and treatment outcomes of sputum smear-positive (SS+) patients based on geographic setting, sex and age categories.METHODS: We undertook a trend analysis over a 4-year period among new TB cases reported in 10 zones using a trend test, a mean comparison t-test and one-way analysis of variance.RESULTS: The average CNR per 100 000 population was 128.9: 126.4 in Amhara and 131.4 in Oromia. The CNR in the project-supported zones declined annually by 6.5%, compared with a 14.5% decline in Tigray, the comparator region. TB notification in the intervention zones contributed 26.1% of the national TB case notification, compared to 13.3% before project intervention. The overall male-to-female ratio was 1.2, compared to 0.8 among SS+ children, with a female preponderance. Over 4 years, the cure rate increased from 75% to 88.4%, and treatment success from 89% to 93%. Default, transfer out and mortality rates declined significantly.CONCLUSION: Project-supported zones had lower rates of decline in TB case notification than the comparator region; their contribution to national case finding increased, and treatment outcomes improved significantly. High SS+ rates among girls deserve attention.

A child's risk of developing tuberculosis (TB) can be reduced by nearly 60% with administration of 6 months course of isoniazid preventive therapy (IPT). However, uptake of IPT by national TB programs is low, and IPT delivery is a challenge in many resource-limited high TB-burden settings. Routinely collected program data was analyzed to determine the coverage and outcome of implementation of IPT for eligible under-five year old children in 28 health facilities in two regions of Ethiopia. A total of 504 index smear-positive pulmonary TB (SS+) cases were reported between October 2013 and June 2014 in the 28 health facilities. There were 282 under-five children registered as household contacts of these SS+ TB index cases, accounting for 17.9% of all household contacts. Of these, 237 (84%) were screened for TB symptoms, and presumptive TB was identified in 16 (6.8%) children. TB was confirmed in 5 children, producing an overall yield of 2.11% (95% confidence interval, 0.76-4.08%). Of 221 children eligible for IPT, 64.3% (142) received IPT, 80.3% (114) of whom successfully completed six months of therapy. No child developed active TB while on IPT. Contact screening is a good entry point for delivery of IPT to at risk children and should be routine practice as recommended by the WHO despite the implementation challenges.

Ethiopia has achieved rapid expansion of TB microscopic centers for acid fast bacilli (AFB). However, external quality assurance (EQA) services were, until recently, limited to few regional and sub-regional laboratories. In this paper, we describe the decentralization experience and the result of EQA using random blinded rechecking. We decentralized sputum smear AFB EQA from 4 regional laboratories (RRLs) to 82 EQA centers and enrolled 956 health facilities (HFs) in EQA schemes. From 2012 to 2014 (Phase I), the false positivity rate declined from 0.6% to 0.2% and false negativity fell from as high as 7.6% to 1.6% in supported HFs. In HFs that joined in Phase II, FN rates ranged from 5.6% to 7.3%. The proportion of HFs without errors increased from 77.9% to 90.5% in Phase I HFs and from 82.9% to 86.9% in Phase II HFs. Overall sensitivity and specificity were 95.0% and 99.7%, respectively. Positive predictive and negative predictive values were 93.3% and 99.7%, respectively. Decentralizing blinded rechecking of sputum smear microscopy is feasible in low-income settings. While a comprehensive laboratory improvement strategy enhanced the quality of microscopy, laboratory professionals' capacity in slide reading and smear quality requires continued support.

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