Cultural and social context of dysentery: implications for the introduction of a new vaccine.

Dysentery, a severe form of diarrhoeal disease, is a major cause of morbidity and mortality. Paradoxically, virtually no studies have been conducted to examine beliefs and behaviours associated with dysentery. The explanatory model of dysentery was explored in a community in Dhaka, Bangladesh, to understand the acceptability of a vaccine against dysentery. A local term for bloody dysentery is widely known, and residents describe a progression of symptoms, which closely mirrors the biomedical model of the disease. Due to the symbolic significance of blood loss and the fact that there is much uncertainty regarding treatment, bloody dysentery is perceived to be extremely serious. Causal interpretations most commonly relate to humoral theories, and remedies involve the consumption of 'cooling' foods that will reduce the heat associated with dysentery. Despite many misconceptions about vaccines and the fact that this approach contradicts aetiological explanations, the perceived severity of the illness makes vaccines attractive compared to other preventative measures. The results illuminate relevant information for the implementation of a new vaccine.

Acceptability and accessibility of a Shigellosis vaccine in Nha Trang city of Viet Nam.

The acceptability and accessibility of a hypothetical Shigella vaccination campaign was explored. A household survey was conducted with 539 randomly-selected residents of six communes in Nha Trang city of Viet Nam. Four categories of acceptability, such as refusers, low acceptors, acceptors, and high acceptors, were established, Refusers were significantly more likely to be elderly women and were less likely to know the purpose of vaccinations. Low acceptors tended to be male, elderly, and live in urban areas. Low acceptors perceived the disease as less serious and themselves as less vulnerable than acceptors and high acceptors. In terms of accessing vaccination, the commune health centre workers and commune leaders were the preferred sources of information and commune health centres the preferred location for vaccination. Direct verbal information from healthcare providers and audio-visual media were preferred to written information. The respondents expressed a desire for knowledge about the side-effects and efficacy of the vaccine. These findings are significant for targeting specific messages about shigellosis and vaccination to different populations and maximizing informed participation in public-health campaigns.

Perceptions of Shigella and of Shigella vaccine among rural Chinese: compatibility with Western models of behavioral change.

Shigella remain a major source of morbidity and mortality in developing countries, including China. In response, national and international researchers are actively working to develop vaccines that will be effective against dysentery and diarrhea caused by shigella dysentariae. With the growing recognition of the problems associated with sustained vaccine acceptance and usage, researchers and policy makers recognize the importance of conducting theory-based qualitative research to inform vaccine development program efforts. Accordingly we undertook this qualitative study involving 81 residents of one of China's rural communities with high rates of dysentery. The semi-structured interviews suggest that a Western model of behavioral change offered a useful research construct. Consistent with the model is the community's strong perception of 'response efficacy' of vaccines, particularly in comparison with water and sanitation and disease treatment. Residents were eager to vaccinate their children despite variable perception of disease severity, while they were less consistent in their interest in vaccinating adults; this enthusiasm for vaccinating children was attributed to China's 'one child per couple' policy. Intervention implications are discussed.