Displaying publications 1 - 20 of 54 in total

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  1. Mazlam MZ
    Med J Malaysia, 1995 Sep;50(3):205-7.
    PMID: 8926895
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  2. Leja M, Grinberga-Derica I, Bilgilier C, Steininger C
    Helicobacter, 2019 Sep;24 Suppl 1:e12635.
    PMID: 31486242 DOI: 10.1111/hel.12635
    This review summarizes recent publications on the epidemiology of Helicobacter pylori. Two major systemic analyses, from Malaysia and Ethiopia, were published. The Brazilian Consensus Conference has stated that H pylori infection is an infectious disease with an indication for antimicrobial therapy. A continuous decrease in H pylori prevalence was reported from many regions worldwide, including Korea, China, Iran, and Austria. A cross-sectional H pylori prevalence study conducted in the United Arab Emirates found 41% prevalence in a group of healthy children and adults. Several studies from Asia addressed H pylori prevalence in adults undergoing regular checkup. The largest of such studies, performed in Korea, involved 24 471 subjects and reported 41.5% seroprevalence. A relatively smaller study from East China on 3252 subjects reported 27.5% prevalence. In contrast, a study from Spain reported 87.2% seroprevalence. A report on the association between smoking and H pylori seropositivity was published on behalf of the Stomach Cancer Pooling (StoP) Project-a consortium of epidemiological studies of gastric cancer. Also, other potential risk factors, including occupational risk factors, water supply, and food were analyzed. Gastroesophageal reflux and sexual partners has been associated with a higher risk for H pylori acquisition, and gut microbiota was suggested to play a role in intrafamilial transmission of H pylori. Finally, in a few studies (from Mexico and Japan), the catalytic model for predicting the potential risk of acquiring H pylori infection in the future was used. As anticipated, a further decline in H pylori-related disease was demonstrated by applying the modeling.
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  3. Goh KL
    J Dig Dis, 2007 Nov;8(4):179-85.
    PMID: 17970873
    The new millennium has seen distinct changes in the pattern of gastrointestinal disease in the Asia-Pacific region. These changes are important as more than half of the world's population come from the region and therefore impact significantly on the global disease burden. The highest incidence of gastric cancer (GCA) has been reported from Asia and GCA remains a very important cancer. However time-trend studies have shown a decrease in GCA incidence in several countries in Asia. A rise in cardio-esophageal cancers as seen in the West has not been reported. On the other hand, colorectal cancer has been steadily increasing in Asia with age-standardized incidence rates of some countries approaching that of the West. The pattern of acid-related diseases has also changed. Gastroesophageal reflux disease is a fast emerging disease with an increasing prevalence of reflux esophagitis and reflux symptoms. The prevalence of peptic ulcer disease has at the same time declined in step with a decrease in H. pylori infection. Many of the changes taking place mirror the Western experience of several decades ago. Astute observation of the epidemiology of emerging diseases combined with good scientific work will allow a clearer understanding of the key processes underlying these changes. With rapid modernization, lifestyle changes have been blamed for an increase in several diseases including gastroesophageal reflux disease, nonalcoholic fatty liver disease and colorectal cancer. A worrying trend has been the increase in obesity among Asians, which has been associated with an increase in metabolic diseases and various gastrointestinal cancers. Conversely, an improvement in living conditions has been closely linked to the decrease in GCA and H. pylori prevalence.
    Matched MeSH terms: Helicobacter Infections/epidemiology
  4. Quek KF, Goh KL
    Am J Gastroenterol, 2008 Jun;103(6):1575.
    PMID: 18510600 DOI: 10.1111/j.1572-0241.2008.01850.x
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  5. Katz AR
    Am J Gastroenterol, 2007 Sep;102(9):2114-5.
    PMID: 17727450
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  6. Suhaila N, Hussin S, Rahman MM
    Pak J Biol Sci, 2010 Nov 01;13(21):1057-61.
    PMID: 21313878
    Abstract: A total number of 157 samples were examined by 4 different tests-In-house rapid urease (iRUT), Culture, Histopathology and Immunochromatography (Immuno CardSTAT) for the detection of Helicobacter pylori from the patients reported to Hospital Kuala Lumpur, Malaysia during 2007 to 2008. Out of the samples examined 47 (29.9%) were positive for H. pylori by the tests used in the laboratory. Efficacy of detection of the bacteria by the tests- In-house rapid urease, Culture, Histopathology and Immuno CardSTAT were 31.8, 13.9, 30.3 and 32.8%, respectively. However, sensitivity and specificity of the iRUT were 91.5 and 93.6%, respectively and the Positive Predictive Value (PPV) was 86% and the Negative Predictive Value (NPV) was 96.3%. The sensitivity for Immuno CardSTAT rapid test was 100% and the specificity was 79.3%. The PPV was 50% and the NPV was 100%. Convenient methods to the authors were 'In house rapid urease test and Immunochromatography though variability of specificities were observed.
    Matched MeSH terms: Helicobacter Infections/epidemiology
  7. Lee YY, Mahendra Raj S, Graham DY
    Helicobacter, 2013 Oct;18(5):338-46.
    PMID: 23607896 DOI: 10.1111/hel.12058
    Helicobacter pylori (H. pylori) infection is etiologically associated with gastric cancer and peptic ulcer diseases which are both important public health burdens which could be largely eliminated by H. pylori eradication. However, some investigators urge caution based on the hypothesis that eradication of H. pylori may result in an increase in the incidence of gastroesophageal reflux disease, esophageal adenocarcinoma, and childhood asthma. The ethnic Malays of northeastern Peninsular Malaysia have long had a low prevalence of H. pylori infection and, as expected, the incidence of gastric cancer and its precursor lesions is exceptionally low. The availability of a population with a low H. pylori prevalence and generally poor sanitation allows separation of H. pylori from the hygiene hypothesis and direct testing of whether absence of H. pylori is associated with untoward consequence. Contrary to predictions, in Malays, erosive esophagitis, Barrett's esophagus, distal esophageal cancers, and childhood asthma are all of low incidence. This suggests that H. pylori is not protective rather the presence of H. pylori infection is likely a surrogate for poor hygiene and not an important source of antigens involved in the hygiene hypothesis. Helicobacter pylori in Malays is related to transmission from H. pylori-infected non-Malay immigrants. The factors responsible for low H. pylori acquisition, transmission, and burden of H. pylori infection in Malays remain unclear and likely involves a combination of environmental, host (gene polymorphisms), and strain virulence factors. Based on evidence from this population, absence of H. pylori infection is more likely to be boon than a bane.
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  8. Goh KL, Chan WK
    Aliment Pharmacol Ther, 2012 Aug;36(3):291-2; discussion 292-3.
    PMID: 22747451 DOI: 10.1111/j.1365-2036.2012.05164.x
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  9. Goh KL, Chan WK, Shiota S, Yamaoka Y
    Helicobacter, 2011 Sep;16 Suppl 1:1-9.
    PMID: 21896079 DOI: 10.1111/j.1523-5378.2011.00874.x
    This review summarizes studies on the epidemiology and public health implications of Helicobacter pylori published in peer-reviewed journals from April 2010 through March 2011. Prevalence rates vary widely between different geographical regions and ethnic groups. An interesting study from the USA identified the degree of African ancestry as an independent predictor of H. pylori infection. Two studies have demonstrated early childhood as the period of transmission of infection and identified an infected sibling as an important risk factor. An oral-oral route of spread has been substantiated with several studies showing the presence of H. pylori in the oral cavity. Studies have shown the presence of H. pylori in drinking water and the role of poor living conditions and sanitation in H. pylori infection, supporting an oral-fecal route of spread. Screening for H. pylori as a gastric cancer pre-screening strategy has been described in Japan, and the importance of H. pylori eradication as a gastric cancer-prevention strategy has now been further emphasized in Japanese guidelines. Two studies have shown a decrease in the burden of dyspepsia and peptic ulcer disease with H. pylori eradication.
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  10. Lee YY, Ismail AW, Mustaffa N, Musa KI, Majid NA, Choo KE, et al.
    Helicobacter, 2012 Feb;17(1):54-61.
    PMID: 22221617 DOI: 10.1111/j.1523-5378.2011.00917.x
    The prevalence of Helicobacter pylori infection is exceptionally low among the Malays in the north-eastern region of Peninsular Malaysia. The reasons are unknown. Our aim was to compare environmental factors that differed in relation to H. pylori prevalence among Malays born and residing in Kelantan.
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  11. Goh KL
    Med J Malaysia, 2009 Sep;64(3):187-92.
    PMID: 20527265
    Observations of racial differences in the prevalence of Helicobacter pylori in Malaysia have been intriguing. The Indians and Chinese consistently have a higher prevalence compared to the Malays. The racial cohort theory has been proposed to explain these differences where transmission and perpetuation of infection takes place within a racial group rather than between races, races being separate owing to the low rate of interracial marriages. Studies have demonstrated distinctive bacterial strains between races. Phylogenetic studies have shown that H. pylori isolates amongst Chinese and Indians are distinctive while Malays have Indian and other strains suggesting a more recent acquisition of the bacterium from Indians. H. pylori is recognized as the major causative factor in peptic ulcer disease and gastric cancer. Despite the high prevalence of H. pylori, Indians have a relatively low prevalence of peptic ulcer disease and a low incidence of gastric cancer. This paradox with regards to gastric cancer has been termed the "Indian enigma". Bacterial strain differences between races may be putative but this observation may also indicate gastroprotective environmental factors or a lower genetic susceptibility to develop cancer in the Indians.
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  12. Raj SM, Lee YY, Choo KE, Noorizan AM, Zulkifli A, Radzi M, et al.
    Trans R Soc Trop Med Hyg, 2008 Nov;102(11):1163-4.
    PMID: 18678380 DOI: 10.1016/j.trstmh.2008.06.015
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  13. Goh KL, Wong HT, Lim CH, Rosaida MS
    Aliment Pharmacol Ther, 2009 Apr 1;29(7):774-80.
    PMID: 19183160 DOI: 10.1111/j.1365-2036.2009.03930.x
    Dramatic changes in the prevalence and pattern of gastrointestinal disease has taken place in Asia in recent years.
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  14. Tan HJ, Goh KL
    J Dig Dis, 2008 Nov;9(4):186-9.
    PMID: 18959588 DOI: 10.1111/j.1751-2980.2008.00344.x
    As in developed societies, the prevalence of Helicobacter pylori has declined rapidly in Asia. This has been shown in both seroprevalence-based and endoscopy-based studies. While the decline in the incidence of gastric cancer has now been observed, a decrease in peptic ulcer disease has not been so clearly evident. This apparent paradox can be explained by an increase in non-H. pylori associated ulcers - such as those related to non-steroidal anti-inflammatory drugs or idiopathic ulcers. The increase of gastroesophageal reflux disease in Asia has been widely observed and commented on and its relationship to the decline in H. pylori speculated upon. However there have been few conclusive studies from Asia on this subject. While the improved diagnosis and elimination of H. pylori has contributed to its decline, a more basic change involving large segments of the Asian population must be responsible. An improvement in hygiene and living conditions that results from more affluent Asian societies is thought to be a possible cause.
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  15. Pillay KV, Htun M, Naing NN, Norsa'adah B
    PMID: 18613553
    This study was conducted to determine the prevalence of Helicobacter pylori (H. pylori) and its associated factors among patients with peptic ulcer disease in Taiping Hospital. Consecutive peptic ulcer disease patients who had undergone esophagogastro-duodenoscopy were included. The H. pylori status was assessed by the rapid urease test. We excluded those who had active bleeding, a perforated peptic ulcer, severe vomiting, a history of gastric surgery, peptic ulcer disease or renal or liver diseases, carcinoma of the stomach, and recent use of antibiotics or proton pump inhibitors. Socio-demography, H. pylori status, medication history and other relevant clinical data were collected from case notes. A total of 416 subjects were selected, 49.7% were positive and 50.3% were negative for H. pylori infection. There were significant associations between H. pylori and age, ethnicity, smoking status and NSAID usage. However, there were no significant relationships between H. pylori status and gender or type of peptic ulcer. Multiple logistic regression showed that other ethnicities than Malays and smokers had a higher risk of H. pylori. Our prevalence rate was low and the identified risk factors were consistent with previous studies. Ethnic differences may be related to genetic and sociocultural behaviors. Quitting smoking may benefit peptic ulcer patients with H. pylori infection.
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  16. Sasidharan S, Uyub AM, Azlan AA
    Trans R Soc Trop Med Hyg, 2008 Dec;102(12):1226-32.
    PMID: 18586289 DOI: 10.1016/j.trstmh.2008.05.006
    HeIicobacter pylori infection rate was determined in 697 consecutive patients with ulcer, gastritis, duodenitis and non-ulcer dyspepsia by endoscopy at a Malaysian hospital in 1999-2002. Biopsies of the gastric antrum and body were subjected to the urease test, Gram staining of impression smears and culture examination. Infection was defined as a positive result in at least one test. The infection rates were 32.1, 10.4, 20.0 and 16.2% in ulcer, gastritis, duodenitis and non-ulcer dyspepsia patients, respectively. Overall, the prevalence of H. pylori infection was 14.6%, with the rate among the Indian (21.7%), Chinese (19.2%) and Bangladeshi foreign worker (23.1%) groups significantly higher (P<0.05) than that of the Malays (5.8%). Generally, the prevalence rate among males (18.9%) was significantly higher (P<0.001) than that among females (9.0%), but for a particular ethnic group, such trend and significant differences (P<0.05) were observed only among the Malays. In terms of gender, the prevalence rates of Malay males and females were also significantly lower (P<0.05) than those of Chinese and Indians. In conclusion, there is a significant difference in H. pylori infection prevalence rates among ethnic groups (highest in Indians, then Chinese and unusually low in Malays) and gender groups (highest in males) in Malaysia.
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  17. Graham DY, Yamaoka Y, Malaty HM
    Trans R Soc Trop Med Hyg, 2007 Sep;101(9):849-51.
    PMID: 17658569
    Helicobacter pylori is one of the few remaining major pathogens that accompanied humans on their travels from Africa. A recently published study reports the unexpected finding of a low H. pylori prevalence among pregnant women in Zanzibar (Farag, T.H., Stolzfus, R.J., Khalfan, S.S., Tielsch, J.M., 2007. Unexpectedly low prevalence of Helicobacter pylori infection among pregnant women on Pemba Island, Zanzibar. Trans. R. Soc. Trop. Med. Hyg. 101). The apparent epidemiology of higher prevalence with higher socioeconomic status and decrease with age are unprecedented. As with many 'unexpected' events, a search of the literature reveals evidence of low prevalence populations in Java and Malaysia, with clues dating back to the mid-twentieth century. Why some populations apparently lost H. pylori infection remains an open question. However, the tools needed to resolve the dilemma are readily available and we hope investigators will soon rise to the challenge.
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  18. Gurjeet K, Subathra S, Bhupinder S
    Med J Malaysia, 2004 Oct;59(4):560-1.
    PMID: 15779598 MyJurnal
    A retrospective study on demographics of gastric carcinoma was conducted in Hospital Pulau Pinang (HPP) with the aim of comparing it to a previous study done in Hospital Universiti Sains Malaysia (HUSM), Kelantan. The incidence of gastric carcinoma was much higher in Penang compared to Kelantan. It was commonest in males and Chinese. The incidence and site of gastric carcinoma closely parallels Helicobacter pylori infection rates. This was evidenced by the higher incidence and non-cardia location of gastric carcinomas in an area with higher H. pylori infection rates (HPP) compared to a much lower incidence and preponderance of cardia tumours in HUSM where the H. pylori infection rate is exceptionally low.
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  19. Goh KL, Peh SC, Wong NW, Parasakthi N, Puthucheary SD
    J Gastroenterol Hepatol, 1990 5 1;5(3):277-80.
    PMID: 2103410
    Over a 15-month period, 399 patients with dyspepsia were investigated for the presence of Campylobacter pylori infection. Half of the patients (50.6%) had Campylobacter organisms in the antrum of the stomach. C. pylori was found in 96.1% of patients with histological changes of chronic active gastritis in the antrum. Of patients with duodenal and gastric ulcers, 87.8% and 87.5%, respectively, had Campylobacter organisms, as did 39.3% of patients with non-ulcer dyspepsia. C. pylori infection was most commonly found in Chinese and Indians. Although the prevalence of infection appeared to increase with age, there was an equal distribution amongst the sexes.
    Matched MeSH terms: Helicobacter Infections/epidemiology*
  20. Lee YY, Raj SM, Sharif SE, Salleh R, Ayub MC, Graham DY
    Dig Dis Sci, 2011 May;56(5):1438-43.
    PMID: 21082350 DOI: 10.1007/s10620-010-1473-1
    Obesity, gastroesophageal reflux, and Barrett's esophagus have all been linked to esophageal adenocarcinoma. In addition, the decline in Helicobacter pylori (H. pylori) infection in affluent societies has also been suggested to be a major factor in the recent rise in the incidence of esophageal adenocarcinoma. If H. pylori infection has a protective role, populations with a naturally low prevalence of H. pylori infection such as the ethnic Malays of Northeastern Peninsular Malaysia should have high rates of esophageal adenocarcinoma.
    Matched MeSH terms: Helicobacter Infections/epidemiology*
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