Asthma symptoms, spirometry and air pollution exposure in schoolchildren in an informal settlement and an affluent area of Nairobi, Kenya

BACKGROUND

Although 1 billion people live in informal (slum) settlements, the consequences for respiratory health of living in these settlements remain largely unknown. This study investigated whether children living in an informal settlement in Nairobi, Kenya are at increased risk of asthma symptoms.

METHODS

Children attending schools in Mukuru (an informal settlement in Nairobi) and a more affluent area (Buruburu) were compared. Questionnaires quantified respiratory symptoms and environmental exposures; spirometry was performed; personal exposure to particulate matter (PM2.5) was estimated.

RESULTS

2373 children participated, 1277 in Mukuru (median age, IQR 11, 9-13 years, 53% girls), and 1096 in Buruburu (10, 8-12 years, 52% girls). Mukuru schoolchildren were from less affluent homes, had greater exposure to pollution sources and PM2.5. When compared with Buruburu schoolchildren, Mukuru schoolchildren had a greater prevalence of symptoms, 'current wheeze' (9.5% vs 6.4%, p=0.007) and 'trouble breathing' (16.3% vs 12.6%, p=0.01), and these symptoms were more severe and problematic. Diagnosed asthma was more common in Buruburu (2.8% vs 1.2%, p=0.004). Spirometry did not differ between Mukuru and Buruburu. Regardless of community, significant adverse associations were observed with self-reported exposure to 'vapours, dusts, gases, fumes', mosquito coil burning, adult smoker(s) in the home, refuse burning near homes and residential proximity to roads.

CONCLUSION

Children living in informal settlements are more likely to develop wheezing symptoms consistent with asthma that are more severe but less likely to be diagnosed as asthma. Self-reported but not objectively measured air pollution exposure was associated with increased risk of asthma symptoms.

Digital video interventions and mental health literacy among young people: a scoping review

BACKGROUND

Mental health literacy is important as it relates to understanding mental illness, increasing help-seeking efficacy, and reducing mental illness-related stigma. One method to improve the mental health literacy of young people is a digital video intervention.

AIMS

A scoping review was conducted to map existing research in the area of digital video interventions for mental health literacy among young people.

METHODS

The scoping review was conducted following the PRISMA-ScR checklist. All results were screened based on our inclusion criteria.

RESULTS

Seventeen studies were selected for analysis. In most studies (n = 14), a digital video was the only intervention whereas three studies took a multi-intervention approach. Only two of the digital video interventions were co-created with people with mental illness or university students. All studies showed positive results in favor of digital video interventions in at least one component of mental health literacy or compared to one of the comparison conditions.

CONCLUSIONS

Digital video interventions represent effective tools for enhancing mental health literacy. However, there is a need for active involvement of end-users in co-creation and to attend to the production quality so that the digital video intervention is as relevant, informed, and effective as possible.

Blastomycosis in Missouri: epidemiology and risk factors for endemic disease

Between 1992 and 1999, 93 cases of blastomycosis, including 25 laboratory confirmed cases, were identified in Missouri (annual incidence, 0.2/100,000 population). Mississippi County in southeastern Missouri had the highest incidence (12/100,000) with a much higher rate among blacks than whites in this county (43.21/100,000). The mortality rate, 44% was also higher among blacks. To determine risk factors for endemic blastomycosis, a case-control study was conducted among southeastern Missouri residents. Independent risk factors for blastomycosis were black race and a prior history of pneumonia. No environmental exposures or socioeconomic factors were significantly associated with increased risk. The increased risk among blacks may possibly be related to genetic factors, but further studies are needed to clarify this. However, heightened awareness of the disease and a better understanding of the risk factors are important and may lead to earlier diagnosis and start of treatment, possibly improving outcome.

Characteristics of an effective fund-raising letter

When you set out to write a fund-raising letter, make sure you know precisely to whom you're writing and why--and be certain your letter makes that point just as clear to them as it is to you.

Preclinical and clinical pharmacology of Rosuvastatin, a new 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitor

Rosuvastatin (formerly ZD4522) is a new 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase inhibitor (statin) with distinct pharmacologic properties. Compared with most other statins, it is relatively hydrophilic, similar in this respect to pravastatin. Rosuvastatin has been shown to be a comparatively potent inhibitor of HMG-CoA reductase activity in a purified preparation of the catalytic domain of the human enzyme, as well as in rat and human hepatic microsomes. In rat hepatocytes, rosuvastatin was found to have significantly higher potency as an inhibitor of cholesterol synthesis than 5 other statins. Rosuvastatin was approximately 1,000-fold more potent in rat hepatocytes than in rat fibroblasts. Further studies in rat hepatocytes demonstrated that rosuvastatin is taken up into these cells by a high-affinity active uptake process. Rosuvastatin was also taken up selectively into the liver after intravenous administration in rats. Potent and prolonged HMG-CoA reductase inhibitory activity has been demonstrated after oral administration to rats and dogs. Pharmacokinetic studies in humans using oral doses of 5 to 80 mg showed that maximum plasma concentrations and areas under the concentration-time curve are approximately linear with dose. The terminal half-life is approximately 20 hours. Studies with human hepatic microsomes and human hepatocytes have suggested little or no metabolism via the cytochrome P-450 3A4 isoenzyme. On the basis of these observations, it is suggested that rosuvastatin has the potential to exert a profound effect on atherogenic lipoproteins.

Global regulatory considerations for unified assay specifications

When developing a biotechnology product for global registration, there are several aspects to evaluate in an effort to unify specifications. These include differences between the United States, Europe and Japan, and Rest-of-World (ROW) countries with regard to the respective regulatory guidelines and pharmacopoeias in force, the state-of-the-art of product testing analytical methods, and the interval between submitting a registration dossier to different countries. In terms of regulatory guidelines, one country may have a monograph or required specifications for particular tests, for example the potency that a product has to meet before clinical trials can be initiated. For pharmacopoeias, different assay methods are required for sterility, general safety, and pyrogen testing, so that one may have to test a specific lot of a product at two or three different times to evaluate the same parameter, because of specific testing differences required for each country's pharmacopoeia. In addition, the state of analytical methods is always evolving and better analytical techniques become available. Sometimes, from starting with one set of tests, and based on the time in development, new tests may be added to the existing list of release specifications, because new analytical techniques have become available. Examining the global registration approval process for Betaseron, (interferon beta-1b) illustrates when specifications were able to be unified and when they were not.

Prevention of hepatitis A virus infection

Hepatitis A virus infection is major cause of acute hepatitis in the United States, accounting for approximately 75,000 cases of clinical illness each year. These infections occur among persons in every age group and are associated with a variety of exposures related to fecal-oral transmission. Recently, the U.S. Food and Drug Administration approved licensure of two inactivated hepatitis A vaccines. Both vaccines are highly immunogenic and have been licensed in pediatric and adult formulations. The prevention of hepatitis A virus infection is directly related to many aspects of family practice, and family physicians may see patients in a variety of settings that warrant administration of hepatitis A vaccine. Groups for whom vaccination is currently recommended include international travelers, children in communities with high rates of hepatitis A virus infection, men who have sex with men, Illicit drug users, patients with chronic liver disease and persons with clotting factor disorders.

Decreased levels of circulating IFN-alpha and increased sCD23 in patients with acute infectious mononucleosis

Epstein-Barr virus (EBV) is the etiological agent for acute infectious mononucleosis (AIM). It is also associated with certain malignant disorders in individuals with immunodeficiencies such as B cell lymphoproliferative disorder (BLPD). Our previous study with BLPD patients had demonstrated significantly higher serum IL-4 and IgE levels and significantly decreased IFN-alpha levels. These observations were consistent with the model of regulation of B cell growth by T cell-derived cytokines, in which IL-4 promotes B cell growth and switch to IgE synthesis whereas IFN-alpha and IFN-gamma inhibit these IL-4 mediated effects. Since AIM is also EBV associated, this study was designed to examine IL-4, IFN-alpha, IFN-gamma, IgE, and soluble CD23 (sCD23) serum levels in AIM patients. In this study we report for the first time that in contrast to BLPD patients, AIM patients did not exhibit increased levels of IL-4 and IgE; however AIM patients to exhibit decreased IFN-alpha levels and, additionally, also exhibit significantly higher sCD23 levels. This could result in B cell activation and have implications for the survival of the virus in B cells.