Two Linked Enteroinvasive Escherichia coli Outbreaks, Nottingham, UK, June 2014.

Enteroinvasive Escherichia coli (EIEC) outbreaks are uncommon in Europe. In June 2014, two EIEC outbreaks occurred in Nottingham, UK, within 2 days; outbreak A was linked to a takeaway restaurant and outbreak B to a wedding party. We conducted 2 analytical studies: a case-control study for outbreak A and a cohort study for outbreak B. We tested microbiological and environmental samples, including by using whole-genome sequencing. For both outbreaks combined, we identified 157 probable case-patients; 27 were laboratory-confirmed as EIEC O96:H19-positive. Combined epidemiologic, microbiological, and environmental findings implicated lettuce as the vehicle of infection in outbreak A, but the source of the organism remained unknown. Whole-genome sequencing identified the same organism in cases from both outbreaks, but no epidemiologic link was confirmed. These outbreaks highlight that EIEC has the capacity to cause large and severe gastrointestinal disease outbreaks and should be considered as a potential pathogen in foodborne outbreaks in Europe.

Clinical characteristics and public health management of invasive meningococcal group W disease in the East Midlands region of England, United Kingdom, 2011 to 2013.

In England and Wales, meningococcal disease caused by group W has historically been associated with outbreaks of disease among travellers to high-risk countries. Following a large outbreak associated with travel to the Hajj in 2000, the number of cases declined and, in 2008, only 19 laboratory-confirmed cases were identified nationally. In 2013, in the East Midlands region of England, eight cases of meningococcal disease caused by this serogroup were recorded, compared with six from 2011 to 2012. To explore this further, data for all cases with a date of onset between 1 January 2011 and 31 December 2013 were collected. Data collected included geographical location, clinical presentation and outcome. Fourteen cases were identified; two died as a result of their illness and two developed long-term health problems. No commonality in terms of geographical location, shared space or activities was identified, suggesting that group W is circulating endemically with local transmission. Clinical presentation was variable. Half presented with symptoms not typical of a classical meningococcal disease, including two cases of cellulitis, which may have implications for clinicians, in terms of timely identification and treatment, and public health specialists, for offering timely antibiotic chemoprophylaxis to close contacts.

Pneumococcal serotypes in adult non-invasive and invasive pneumonia in relation to child contact and child vaccination status.

BACKGROUND: On a population level, pneumococcal conjugate vaccination in children has reduced the incidence of vaccine-type disease in all age groups, including older adults. Few individual level studies have been performed describing the pneumococcal serotypes associated with adult community acquired pneumonia (CAP) and quantifying associations with child contact and child vaccination status. METHODS: Pneumococcal serotypes were determined using a validated multiplex immunoassay (Bio-Plex) in a large prospective cohort of adults hospitalised with CAP. Child (<16 years old) contact history and child pneumococcal vaccination status were obtained from patients and public health records, respectively. RESULTS: Of 1130 participants, 329 (29.1%) reported child contact, and pneumococcal infection was identified in 410 (36.3%). Pneumococcal CAP was commoner in adults with child contact (148/329 (45.0%) vs 262/801 (32.7%); adjusted OR 1.63, CI 1.25 to 2.14; p<0.001). A serotype was determined in 263 of 410 (64.1%) adults with pneumococcal CAP; 112 (42.6%) reported child contact, 38 (33.9%) with a vaccinated child. Adults in contact with a vaccinated child were significantly less likely to have vaccine-type CAP compared with adults in contact with an unvaccinated child (6 of 38 (15.8%) vs 25 of 74 (33.8%), respectively; OR 0.37, 95% CI 0.14 to 0.99; p=0.044). CONCLUSIONS: Pneumococcal aetiology in adult CAP is independently associated with child contact and implicated serotypes are influenced by child vaccination status. This is the first study to demonstrate these associations at an individual rather than population level; it affirms that 'herd protection' from childhood vaccination extends beyond adult invasive disease to pneumococcal CAP.

An audit of neonatal and infant hepatitis B immunisation and serological testing in two counties of England, 2007-12.

We audited adherence to national hepatitis B virus (HBV) immunisation policy for neonates and infants born to HBV positive mothers in two counties of England during 2007/08 to 2011/12 (n=112 in County X, n=190 in County Y). Over the five year period, 29.9% of at risk neonates in County X and 23.5% in County Y required hepatitis B immunoglobulin (HBIG) at birth. The annual median age of HBIG administration was 0.0-0.5 days. The annual median coverage and timeliness of the first (coverage range 92.3-100.0%; age of administration range 0.0-0.0 days), second (83.8-100.0%; 32.0-42.0 days), third (81.1-100.0%; 62.0-81.0 days) and fourth dose HBV immunisations (44.4-91.9%; 378.0-443.0 days) and serological testing (8.6-81.0%; 450.0-707.0 days) were calculated. Statistically significant variation was found in the coverage of third and fourth dose immunisations in County Y, age of fourth dose immunisation in County X, and the coverage and timeliness of serological testing in both counties (p < 0.05). HBIG and the first three HBV immunisations were commonly administered according to the national schedule. Fourth dose immunisations and serological tests showed poor adherence. We advocate public health interventions to improve immunisation programme outcomes and hepatitis B surface antigen testing.