Novel facile synthesis of imidazo[1,2-<Emphasis Type="Italic">b</Emphasis>]-[1,2,4,5]tetrazines with potential antimicrobial activity

Starting from 1-amino-2-methylthio-4-phenylimidazole 2, a series of the title compounds have been synthesized via its reactions with various hydrazonoyl halides 3. The mechanism of the reactions studied is discussed. The structure of the compounds prepared were elucidated on the basis of their elemental analyses, spectral data and alternate synthesis. The antimicrobial activities of the compounds prepared were screened and the results showed that most of such compounds exhibit considerable activities.     

美国国家骨髓库20年回顾:儿童急性白血病无关供者骨髓移植

自1987年以来,NMDP有效推动了儿童无关供者造血干细胞移植(HCT)的发展.在庆祝NMDP成立20周年之际,本文就儿童急性白血病患者移植所取得的成果和经验加以总结,目的在于进一步提高移植疗效,把握未来研究方向.     

Using lot quality assurance sampling to improve immunization coverage in Bangladesh.

OBJECTIVE: To determine areas of low vaccination coverage in five cities in Bangladesh (Chittagong, Dhaka, Khulna, Rajshahi, and Syedpur). METHODS: Six studies using lot quality assurance sampling were conducted between 1995 and 1997 by Basic Support for Institutionalizing Child Survival and the Bangladesh National Expanded Programme on Immunization. FINDINGS: BCG vaccination coverage was acceptable in all lots studied; however, the proportion of lots rejected because coverage of measles vaccination was low ranged from 0% of lots in Syedpur to 12% in Chittagong and 20% in Dhaka's zones 7 and 8. The proportion of lots rejected because an inadequate number of children in the sample had been fully vaccinated varied from 11% in Syedpur to 30% in Dhaka. Additionally, analysis of aggregated, weighted immunization coverage showed that there was a high BCG vaccination coverage (the first administered vaccine) and a low measles vaccination coverage (the last administered vaccine) indicating a high drop-out rate, ranging from 14% in Syedpur to 36% in Dhaka's zone 8. CONCLUSION: In Bangladesh, where resources are limited, results from surveys using lot quality assurance sampling enabled managers of the National Expanded Programme on Immunization to identify areas with poor vaccination coverage. Those areas were targeted to receive focused interventions to improve coverage. Since this sampling method requires only a small sample size and was easy for staff to use, it is feasible for routine monitoring of vaccination coverage.     

Introducing nurse telephone triage into primary care

In this article, the authors describe the changes required to introduce a nurse telephone triage system into a large primary care practice in York. 'Whole systems' changes were necessary in that not one element of the primary healthcare team (PHCT) system has remained unaffected. The introduction of nurse triage has changed working practices, professional working relationships and job satisfaction. Far from being just a workload management solution, it has fundamentally altered the way that nurses, doctors and reception staff work together and with patients.     

Sleeping position and sudden infant death syndrome (SIDS): effect of an intervention programme to avoid prone sleeping

The proportion of prone sleeping among sudden infant death syndrome (SIDS) victims and infants in general, and the rate of SIDS were prospectively studied in the county of Hordaland, Norway, three years before (1987–89) and three years after (1990–92) a campaign to discourage prone sleeping. Before the campaign, 64% of random reference infants were put prone versus 8% after (p < 0.0001). Concurrently, the rate of SIDS decreased from 3.5 to 1.6 per 1000 live births (63 infants before and 30 after the campaign, p = 0.0002). Prone sleeping was not considered a statistically significant risk factor for SIDS before (OR 2.0,95% CI 0.8–4.5), but was highly significant (OR 11.3,95% CI 3.6–36.5) after the campaign. Prone sleeping is an important risk factor for SIDS, but the association may be missed in epidemiological studies if prone is the predominant sleeping position. Behaviour with regard to sleeping position may be changed rapidly by means of a simple campaign.