Dyspepsia Management in a Resource Poor Setting

Background: Dyspepsia has a significant impact on the quality of life of the sufferer, and results in enormous societal costs, either due to direct medical costs for physician visits, diagnostic tests, medications, or indirect costs from absenteeism or reduced productivity at work. It is therefore important to explore the management options available, especially in a resource poor setting like Nigeria, in the light of the foregoing.Methods: Extensive internet literature search was made through Google scholar, Pubmed and HINARI. Keywords employed were dyspepsia, prevalence and management.Result: Several approaches proposed for the management of a newly diagnosed patient with dyspepsia include: empirical trial of acid suppression for 4-8 weeks in regions with low prevalence of H. pylori ; the “test and treat” approach for H. pylori infection using a validated non-invasive test and; initial use of upper gastrointestinal endoscopy to determine the nature of the disease before treatment in patients with alarm symptoms and those who are more than 45 years. Helicobacter pylori eradication therapy without initial diagnostic testing can be used as the last result in resource poor regions of the word where diagnostic tests for H. pylori are not available or not cost-effective.Conclusion: Considering the high cost of upper gastrointestinal endoscopy and the high prevalence of H. pylori infection in developing countries like Nigeria, it seems reasonable that the ‘test and treat’ method will be of immense usefulness in population sub-group who are less than 45 years without alarm symptoms, while those with alarm symptoms and those with onset of symptoms after 45 years will require initial upper gastrointestinal endoscopy.Keywords: Dyspepsia, Classification, Pathophysiology and Management

Discharge against medical advice: Ethico-legal implications from an African perspective

Background. Discharge against medical advice (DAMA) is a problematic issue for physicians worldwide, which can disrupt the physicianpatientrelationship, have adverse medical outcomes and increase healthcare costs. This review aims to highlight the ethical and legal aspects of the issue from the perspective of developing countries in Africa, and make suggestions for resolving them.Methods. A comprehensive literature review of articles relating to DAMA was performed using databases such as PubMed, Medline and Google Scholar. The search criteria used were ‘discharge against medical advice AND ethics*’, ‘discharge against medical advice AND Africa’, ‘leaving against medical advice’, ‘discharge against medical advice AND legal issues’ and ‘self-discharge’. Relevant articles published from 1980 till 31 December 2011 were included.Results. The conflict between the professional values (beneficence) of the physician and the autonomy (self-determination) of the patient isthe most prominent ethical dilemma in cases of DAMA. The issue of DAMA is more complicated in developing countries, especially because of communal models of decision making. One important ethical dilemma is the rationing of hospital admissions, especially for chronic conditions with poor prognosis. We have suggested a communal model for dealing with the issues. The main legal issue found in this review is the possibility of medical doctors being sued for medical malpractice.Conclusion. DAMA is associated with numerous ethical and legal issues of which physicians need to take cognizance

Diagnostic accuracy of rapid urease test for the diagnosis of Helicobacter pylori gastic biopsies in Nigerian with dyspepsia

Background: The strong association of Helicobacter pylori (H. pylori) with dyspepsia has caused a major paradigm shift in patients’ management. It has been observed that histology is usually employed as the routine test for the diagnosing H. pylori in centres where  Oesophagogastroduodenoscopy (OGD) is available in Nigeria. Because of the drawbacks attendant to the use of histology, in terms of cost effectiveness and technical expertise, it is necessary to evaluate the diagnostic accuracy of a simpler alternative for ease of management of patients with dyspepsia.Objective: This study evaluated the diagnostic accuracy of rapid urease test (RUT) in the diagnosis of Helicobacter pylori (H. pylori) in patients with dyspepsia.Methods: Eighty-six consecutive adult patients with dyspeptic symptoms presenting for endoscopy were recruited after giving informed consent. Gastric antral biopsies were collected at endoscopy for RUT and histology. Sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) of RUT was calculated using histology as the referencestandard. Results: Of the 86 subjects, there were 39 (45.3%) males and 47(54.7%) females. The mean age was 49.19±13.75 years. The age range was 23 to 85 years. The sensitivity, specificity, PPV, NPV of RUT was 93.33%, 75.6 %, 80.76 %, and 91.17 % respectively.Conclusion: RUT is accurate for the diagnosis of H. pylori infection. Its use will serve as a good alternative to histology in management of patients with dyspepsia in resource poor environments, except in patients who need histology for reasons other than H. Pylori diagnosis.Key words: Dyspepsia, Helicobacter pylori, Rapid Urease test, Histology

Mixed Infection with cagA Positive and cagA Negative Strains of Helicobacter pylori Lowers Disease Burden in The Gambia

BACKGROUND: The prevalence of Helicobacter pylori including strains with putatively virulent genotypes is high, whereas the H. pylori-associated disease burden is low, in Africa compared to developed countries. In this study, we investigated the prevalence of virulence-related H. pylori genotypes and their association with gastroduodenal diseases in The Gambia. METHODS AND FINDINGS: DNA extracted from biopsies and H. pylori cultures from 169 subjects with abdominal pain, dyspepsia or other gastroduodenal diseases were tested by PCR for H. pylori. The H. pylori positive samples were further tested for the cagA oncogene and vacA toxin gene. One hundred and twenty one subjects (71.6%) were H. pylori positive. The cagA gene and more toxigenic s1 and m1 alleles of the vacA gene were found in 61.2%, 76.9% and 45.5% respectively of Gambian patients harbouring H. pylori. There was a high prevalence of cagA positive strains in patients with overt gastric diseases than those with non-ulcerative dyspepsia (NUD) (p = 0.05); however, mixed infection by cagA positive and cagA negative strains was more common in patients with NUD compared to patients with gastric disease (24.5% versus 0%; p = 0.002). CONCLUSION: This study shows that the prevalence of H. pylori is high in dyspeptic patients in The Gambia and that many strains are of the putatively more virulent cagA+, vacAs1 and vacAm1 genotypes. This study has also shown significantly lower disease burden in Gambians infected with a mixture of cag-positive and cag-negative strains, relative to those containing only cag-positive or only cag-negative strains, which suggests that harbouring both cag-positive and cag-negative strains is protective

Prevalence of Helicobacter pylori among Nigerian patients with dyspepsia in Ibadan

Introduction: Determination of the true prevalence of Helicobacter pylori (H. pylori) is difficult in a hyper-endemic area like Nigeria with use of serological tests because of their low discriminatory power between previous and current infections. The use of biopsy based methods will go a long way to mitigate this problem. We investigated the prevalence of H. pylori in dyspeptic patients and its relationship with gastroduodenal pathologies using gastric biopsy histology and rapid urease test. Methods: Eighty-six consecutive adult patients with dyspepsia underwent upper gastrointestinal endoscopy using forward-viewing endoscopes. Antral biopsy specimens were collected for histology and rapid urease test. Diagnosis of H. pylori infection was made if both or either of the tests was positive. Results: Of the 86 subjects, there were 39 (45.3%) males and 47(54.7%) females. The age range was 23 to 85 years with a mean of 49.19±13.75 years. Diagnosis of H. pylori was made in 55(64%) patients. Gastritis was the commonest endoscopic finding (60.5%), serious gastroduodenal pathology (gastric ulcer, duodenal ulcer and gastric cancer) were documented in only 12 (14%) patients. Thirty three (63.5%) of the 55 patients with gastritis had H. pylori infection while 7(58.3%) of the 12 patients with serious gastroduodenal lesions had the infection. Thirteen (72.2%) of the 18 patients that had normal endoscopic findings were H.pylori positive. Conclusion: The prevalence of H. pylori among dyspeptics using biopsy based methods is high in the South-Western part of Nigeria. It is therefore important to test and treat H. pylori among Nigerians with dyspepsia

Population Genetic Analyses of Helicobacter pylori Isolates from Gambian Adults and Children

The gastric pathogen Helicobacter pylori is one of the most genetically diverse of bacterial species. Much of its diversity stems from frequent mutation and recombination, preferential transmission within families and local communities, and selection during persistent gastric mucosal infection. MLST of seven housekeeping genes had identified multiple distinct H. pylori populations, including three from Africa: hpNEAfrica, hpAfrica1 and hpAfrica2, which consists of three subpopulations (hspWAfrica, hspCAfrica and hspSAfrica). Most detailed H. pylori population analyses have used strains from non-African countries, despite Africa's high importance in the emergence and evolution of humans and their pathogens. Our concatenated sequences from seven H. pylori housekeeping genes from 44 Gambian patients (MLST) identified 42 distinct sequence types (or haplotypes), and no clustering with age or disease. STRUCTURE analysis of the sequence data indicated that Gambian H. pylori strains belong to the hspWAfrica subpopulation of hpAfrica1, in accord with Gambia's West African location. Despite Gambia's history of invasion and colonisation by Europeans and North Africans during the last millennium, no traces of Ancestral Europe1 (AE1) population carried by those people were found. Instead, admixture of 17% from Ancestral Europe2 (AE2) was detected in Gambian strains; this population predominates in Nilo-Saharan speakers of North-East Africa, and might have been derived from admixture of hpNEAfrica strains these people carried when they migrated across the Sahara during the Holocene humid period 6,000-9,000 years ago. Alternatively, shared AE2 ancestry might have resulted from shared ancestral polymorphisms already present in the common ancestor of sister populations hpAfrica1 and hpNEAfrica