Harnessing chondroitin sulphate in composite scaffolds to direct progenitor and stem cell function for tissue repair.

The development of bioscaffolds that incorporate chondroitin sulphate (CS) and their applications with progenitor and stem cells in cartilage, bone, cornea, skin, and neural repair are reviewed. CS is a heterogeneous structure due to the organisation of multiple CS disaccharide sulphation motifs, giving rise to a vast range of CS chain structures, and hence the wide range of biological activity. The incorporation of this biological molecule represents a significant advance in bioscaffold design and performance in tissue repair strategies. The intrinsic stem-cell directive properties of CS are covered in the context of tissue development, and the differing CS disaccharide motifs, referred to as the 'glyco-code'. These structural motifs contribute to stem cell proliferation and differentiation in the scaffold environment and improve outcomes in terms of tissue repair or regeneration worthy of future research.

Tuberculosis notification and treatment outcome among migrant boat arrivals in Malta, 2007-2011.

The annual incidence of tuberculosis (TB) in Malta has remained low, at <20 per 100 000 population per year. However, TB notification among vulnerable groups is on the rise and is a matter of public health concern. We measured the TB notification rate, which ranged from 470 to 880/100 000 among migrant boat arrivals 1 year after arrival, highlighting the need to maintain high treatment success rates. Early case detection and high treatment success were observed due to post-arrival screening; however, the need for pragmatic, patient-friendly approaches that will encourage self-referral and access to treatment among migrant groups could play a significant role in preventing the re-emergence of TB in low-incidence settings.

Prevalence of latent tuberculosis, syphilis, hepatitis B and C among asylum seekers in Malta.

BACKGROUND: In the last few years, Malta has witnessed increasing immigration flows from the Libyan coasts. Public health policies are focused on screening migrants for tuberculosis, whereas no systematic actions against STIs are implemented. The aim of this study is to define the epidemiological profile of asylum seekers in Malta as regards syphilis, hepatitis B, C and latent tuberculosis, thus supporting screening policies. METHODS: Five hundred migrants living in open centres were screened between December 2010 and June 2011. RESULTS: 83.2% of people was from Somalia, 81.2% males, average age 26.5 years. The tuberculin skin test (TST) was positive in 225 migrants (45%). Latent syphilis was diagnosed in 11 migrants, hepatitis C in 3 and 31 migrants were HBsAg positive. CONCLUSION: Systematic screening for asymptomatic migrants in Malta is not recommended for hepatitis C and syphilis, given the low prevalence observed. On the contrary, it should be considered for hepatitis B. TST could be indicated as the first step of a two step screening for migrants from countries with high TB incidence. Efficacy and cost-effectiveness could be achieved by further targeting screening to specific subgroups at higher risk of reactivation, such as people living with HIV and subjects affected by chronic diseases.

[Cerebellar hemorrhage and unilateral asterixis]. / Hémorragie cérébelleuse et astérixis unilatéral.

A hypertensive woman presented with asterixis ipsilateral to a cerebellar hemorrhage. Asterixis has not previously been described in association with a cerebellar lesion. The presence of asterixis in this patient may have been due to a reduction of afferent information through the loss of the dentato-thalamo-cortical input. Unilateral asterixis denotes a dysfunction of the mechanism underlying sustained muscular contraction and not a precise cerebral localisation.