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Sustainable development will not happen without substantial contributions from and leading roles of companies and business organizations. This requires the provision of adequate information on

Sustainable development will not happen without substantial contributions from and leading roles of companies and business organizations. This requires the provision of adequate information on corporate social and ecological impacts and performance. For the last decade, progress has been made in developing and adapting accounting mechanisms to these needs but significant work is still needed to tackle the problems associated with conventional accounting.

Question 25 Is telithromycin as, or more, effective than clarithromycin in the treatment of Helicobacter pylori? If so, what is the recommended dosage and how long should treatment be continued?

Question 26 Currently favoured regimens for eradication of Helicobacter pylori are triple therapy with a proton pump inhibitor along with two antibiotics for 1 week. For example: Omeprazole 20 mg metronidazole 400 mg and clarithromycin 500 mg (all twice daily). Omeprazole 20 mg clarithromycin 500 mg and amoxicillin 1 g (all twice daily). Resistance to amoxicillin has not yet been demonstrated. Previously, regimens such as omeprazole, metronidazole, amoxicillin and clarithromycin were recommended; are these regimens no longer used? The reason behind this question is the 'sky-high' cost of clarithromycin in Pakistan, which is inversely proportional to patient compliance (that is, low-cost regimens tend to have a higher rate of compliance)

Question 27 What is the difference between the management of a gastric and of a duodenal ulcer?

Question 28 How does omeprazole suppress Helicobacter pylori? Question 29 Does omeprazole cause rebound hyperacidity? Does this also apply to H2-blockers?

Question 30 On (K&C 7e, p. 249), you state that the postsynaptic neurotransmitter that inhibits the relaxation of lower oesophageal sphincter (LOS) is nitric oxide (NO). I have understood NO to promote relaxation of LOS by acting on the non-adrenergic, non-cholinergic (NANC) inhibitory neurones, which inhibits the action of cholinergic excitatory neurones. Could you please explain this paradox?

Question 31 It is stated that nitric oxide (NO) inhibits the relaxation of the lower oesophageal sphincter (LOS) and that sildenafil is given for treating achalasia. As far as I know, sildenafil acts to increase the guanine monophosphate (GMP), just as NO uses the same mechanism to relax the LOS. Could you explain this paradox?

Question 32 In Kumar and Clark Clinical Medicine you mention that auscultation is not important in cases of gastrointestinal disorders, but Harrison's Principles of Internal Medicine gives this as being of equal importance because succussion splash and bowel sounds can help in presumptive diagnosis. Succussion splash indicates gastric obstruction (e.g. gastroparesis) and likewise bowel sounds can help determine the status of developing ileus. Would you agree that this is therefore a diagnostic tool?

Question 33 Is it hazardous to give aspirin in the antiplatelet doses (75-325 mg/day) to a patient with a past history of haematemesis proved to be from a peptic ulcer?

Question 34 How can upper gastrointestinal (GI) bleeding be distinguished from lower GI bleeding by using faecal analysis?

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