Charlotte Anderson

Cluster of human tuberculosis caused by Mycobacterium bovis: evidence for person-to-person transmission in the UK

BACKGROUND Despite a recent resurgence in the incidence of bovine tuberculosis in UK cattle herds, no associated rise in the number of cases in man has been noted. Disease due to human Mycobacterium bovis infection usually occurs in older patients, in whom drinking unpasteurised milk in the past is the probable source of infection. Person-to-person transmission is very rare. METHODS After identification of two epidemiologically-linked cases of human M bovis infection through routine laboratory and surveillance activities, all patients identified with M bovis infection in the Midlands from 2001-05 (n=20) were assessed by DNA fingerprinting (MIRU-VNTR and spoligotyping), with additional interviews for patients with a clustered strain. FINDINGS A cluster of six cases was identified. All clustered cases were young and UK-born; five patients had pulmonary disease, and one patient died due to M bovis meningitis, with four patients possessing factors predisposing to tuberculosis. All patients had common social links through visits to bars in two different areas. With the exception of the first case, there was an absence of zoonotic links or consumption of unpasteurised dairy products, suggesting that person-to-person transmission had occurred. INTERPRETATION This report of several instances of M bovis transmission between people in a modern urban setting emphasises the need to maintain control measures for human and bovine tuberculosis. Transmission and subsequent disease was probably due to a combination of host and environmental factors. Prospective surveillance and DNA fingerprinting identified the cluster, enabling health protection teams to set up control measures and prevent further transmission.

Infantile overnutrition in the first year of life: a field study in Dudley, Worcestershire.

A survey of feeding patterns and nutrient intake in relation to the growth of 300 normal infants up to 1 year of age in Dudley, Worcestershire, highlights a problem of overnutrition in the group; 50 (16·7%) were found to be suffering from infantile obesity and a further 83 (27·7%) were overweight. During the first three months of life the daily energy intakes of 136 cal/kg body weight for boys and 149 for girls were markedly greater than the level of 120/kg recommended by the Department of Health and Social Security. This coincided with the early addition of solid foods to a full milk intake. 119 babies (39·7%) were offered solids before they were 4 weeks old and 280 (93·3%) before 13 weeks of age. Some babies had solids from the first week after birth. Protein intake was persistently high throughout the first year, and the mean intake of 32·7 g/day was much greater than the intake of 20 g for infants aged up to 1 year recommended by the Department of Health. Standards for fat and carbohydrate intake are not available but in comparison with the levels reported in breast-fed babies intake of fat and carbohydrate was high in the first three months and came closer to the desired level for the former and remained slightly high for the latter in the subsequent age quarters. The relation of childhood and subsequent adult obesity to infant feeding patterns is not yet clear, but there is a high correlation between obese parents and obese and overweight babies; had these babies not been overfed the condition might have been prevented.

Tuberculosis in the UK--time to regain control.

Tuberculosis is increasing in incidence in many large cities in the UK. This contrasts with stable or declining rates in most western European countries. Ibrahim Abubakar and colleagues explain why and describe what needs to be done to regain control

Aspects of bile acid metabolism in cystic fibrosis

Previous reports have indicated that cystic fibrosis (CF) patients with pancreatic enzyme insufficiency have a raised faecal bile acid output. In this study, 18 out of 29 CF patients and 2 out of the 4 non-CF patients with pancreatic enzyme insufficiency had raised faecal bile acid levels. In the CF patients no correlation was found between faecal bile acid and faecal fat excretion, but an inverse relation was shown between faecal bile acid values and age. Those CF patients with overt liver disease tended to have the lowest faecal bile acid values. Duodenal aspiration in 5 CF patients and in one non-CF patient with pancreatic enzyme insufficiency (Shwachman-Diamond syndrome), produced very small fluid volumes. Duodenal fluid mean total bile acid concentrations were within normal limits. Estimation of serum bile acids in these 6 patients showed that 3 patients had raised serum bile acid values. It is suggested that excessive chronic faecal bile acid loss may produce a contraction of the bile acid pool, and lead eventually to a reduction of intraduodenal bile acid concentrations. Measures which curtail faecal bile acid loss may have a particular significance in the management of CF.

Increasing antituberculosis drug resistance in the United Kingdom: analysis of National Surveillance Data.

Objective To identify recent trends in, and factors associated with, resistance to antituberculosis drugs in England, Wales, and Northern Ireland. Design Cohort of tuberculosis cases reported to the enhanced tuberculosis surveillance system matched to data on drug susceptibility and national strain typing data. Setting England, Wales, and Northern Ireland 1998-2005. Main outcome measures Unadjusted and adjusted odds ratios for drug resistance and associated factors. Proportion of multidrug resistant tuberculosis cases clustered. Results 28 620 culture confirmed cases were available for analysis. The proportion of cases resistant to isoniazid increased from 5% to 7%. Rifampicin resistance increased from 1.0% to 1.2% and multidrug resistance from 0.8% to 0.9%. Ethambutol and pyrazinamide resistance remained stable at around 0.4% and 0.6%, respectively. Regression analyses showed a significant increase in isoniazid resistance outside London (odds ratio 1.04, 95% confidence interval 1.01 to 1.07, a year, associated with changes in age (0.98, 0.98 to 0.99, a year), place of birth (1.49, 1.16 to 1.92), and ethnicity (P<0.05). In London, the rise (1.05, 1.02 to 1.08, a year) was related mainly to an ongoing outbreak. Increases in rifampicin resistance (1.06, 1.01 to 1.11, a year) and multidrug resistance (1.06, 1.00 to 1.12, a year) were small. A fifth of patients with multidrug resistant tuberculosis in 2004-5 had indistinguishable strain types, and one case was identified as extensively drug resistant. Conclusions The rise in isoniazid resistance reflects increasing numbers of patients from sub-Saharan Africa and the Indian subcontinent, who might have acquired resistance abroad, and inadequate control of transmission in London. The observed increases highlight the need for early case detection, rapid testing of susceptibility to drugs, and improved treatment completion.

Tuberculosis in UK prisoners: a challenge for control.

Aims Prisoners include a disproportionate number of those with social and clinical risk factors for tuberculosis and pose a challenge for control. The aim of this study was to investigate the characteristics of prisoners with tuberculosis in order to inform clinical management and control policy. Methods Between 2004 and 2007, 205 patients newly diagnosed as having tuberculosis in prison in the UK identified in national surveillance reports were studied. Isolates from prisoners were tested for susceptibility to first-line antituberculosis drugs and strain typed where possible. Results Prisoners were significantly more likely to be UK-born (47 vs 25%), to be white (33 vs 22%) and to have pulmonary disease (75 vs 56%) than other tuberculosis patients. Pulmonary cases were also more likely to be sputum-smear-positive (69 vs 57%). Over one-third of culture confirmed cases among prisoners were resistant to isoniazid. Less than half (48%) of patients diagnosed as having tuberculosis in prison completed treatment, with a fifth lost to follow-up. Discussion In the UK, imprisonment is an important risk factor for tuberculosis, especially drug-resistant and infectious forms of the disease. The management of tuberculosis among UK prisoners is further complicated by high rates of loss to follow-up care and poor treatment outcomes.

Comparative trial of pancrex V forte and nutrizym in treatment of malabsorption in cystic fibrosis.

A cross-over trial of pancreatic enzyme replacement therapy has been conducted on 12 children with cystic fibrosis using Pancrex V forte and Nutrizym tablets in equivalent dosage. No differences were found in the effectiveness of these products as measured by stool volume, number of bowel actions, faecal fat excretion, and urine urea excretion. Neither product eliminated the steatorrhoea. Though there was no laboratory evidence to support their choice nine patients expressed a preference for Nutrizym at the conclusion of the trial. This preference was based partly on the smaller number of tablets which are required.

Patterns of early transmission of pandemic influenza in London – link with deprivation

Please cite this paper as: Balasegaram et al. (2012) Patterns of early transmission of pandemic influenza in London – link with deprivation. Influenza and Other Respiratory Viruses 6(3), e35–e41.

The risk to infants from nosocomial exposure to tuberculosis.

We undertook a systematic literature and database review for reports of nosocomial exposures of infants less than 24 months of age to tuberculosis. We found 7 instances of transmission among 4867 babies in 26 reports (19 published, 7 from a national database for reporting such events).

Tuberculosis in London: not unexpected.

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