球形芽孢杆菌发泡块剂灭致乏库蚊幼虫的效果

作者应用球形芽孢杆菌Ｂｓ－９４１发泡块剂（由本所生产）和Ｂｓ－Ｆｔ发泡块剂（德国提供），在实验室和现场进行灭致乏库蚊的效果比较。室内生物测定结果显示：Ｂｓ－９４１发泡块剂ＬＤ_（６０）为０．０１９３μｇ／ｍｌ，Ｂｓ－Ｆｔ发泡块剂ＬＤ_（６０）为０．００７μｇ／ｍｌ．在３．６～４．０ｍ￣２的现孳生地水池中，两种发泡剂使用剂量为０．５，１．０和１．５ｇ／ｍ￣２，制剂４８ｈ的灭蚊效果均可达１００％，当剂量为０．５ｇ／ｍ￣２时，Ｂｓ－９４１发泡块剂持效达１７天，而Ｂｓ－Ｆｔ发泡块剂只有９天；当剂量上升到１．５ｇ／ｍ￣２时，两种发泡剂的持效均可达到２１天。对照组乳剂Ｂｓ－Ｃ_（３ｃ－４１）的浓度为０．９２μｌ／ｌ（与１．５ｇ／ｍ￣２相当）时，持效为９天，说明本所生产的Ｂｓ发泡块剂在中小型挛生地中比Ｂｓ乳剂持效长，并且超过德国Ｂｓ发泡块剂的效果和持效。     

几种改进的漂浮颗粒剂灭中华按蚊和致倦库蚊的效果

目的：比较几种改进的漂浮颗粒剂灭中华按蚊和致倦库蚊幼虫的效果。方法：现场试验。结果：室内生物测定,Ｂ．ｔ．ｓ－１８７漂浮颗粒剂（荷叶型）ＬＤ５０为０．４０８７μｇ／ｍｌ,Ｂａｃｔｉｍｏｓ颗粒剂（荷叶型）ＬＤ５０为０．９３４４μｇ／ｍｌ,Ｂ．ｓ－Ｃ３－４１漂浮颗粒剂（荷叶型）ＬＤ５０为０．０５９９μｇ／ｍｌ。稻田灭中华按蚊幼虫的效果显示：两种Ｂ．ｔ．ｓ漂浮颗粒剂（荷叶型）０．８１ｇ／ｍ２剂量时,２４ｈ灭蚊效果均可达１００％。１８７漂浮颗粒剂持效可达１１ｄ,Ｂａｃｔｉｍｏｓ漂浮颗粒剂持效为８ｄ。１８７颗粒剂和Ｂ．ｓ－Ｃ３－４１颗粒剂现场灭致倦库蚊的效果显示：在０．６８ｇ／ｍ２剂量时,２４ｈ蚊幼密度下降率分别为１００％和９９．１％,持效分别为９ｄ和８ｄ。结论：采用荷叶粉为主要载体,在自然界中易于分解,不造成污染,而且灭蚊即效和持效均较好。     

苏云金杆菌和球形芽孢杆菌（3—4）灭蚊幼漂浮颗粒剂的效果观察

湖北省寄生虫病防治研究所研制的Ｂｔｉ和ＢＳ－Ｃ３－４１漂浮颗粒剂在现场中对中华按蚊和致乏库蚊幼虫的效果进行了试验，结果显示Ｂｔｉ漂浮颗粒剂对稻田中的中华按蚊有较好的毒杀效果。剂量为０．４５ｇ／ｍ＾２时，２４小时中华按蚊幼虫密度下降率为８６。６％￣１００％。持效达１４￣１５天，ＢＳ－Ｃ３－４１漂浮颗粒剂剂量为０．４５ｇ／ｍ＾２￣０．５４ｇ／ｍ＾２，４８小时加幼虫密度下降率为９０．４％￣９７．４％，持     

苏云金芽孢杆菌以色列变种的两种漂浮颗粒剂灭中华按蚊幼虫效果比较

用美国Ｂａｃｔｉｍｏｓ可湿性粉剂（Ｂｔｉ－１８９７）和国产Ｂｔ－１８７乳剂生产的两种漂浮颗粒剂灭中华按蚊幼虫的结果表明：后者对中华按蚊幼虫的效价（１２０ＩＴＵ／ｍｇ）比前者（３７０ＩＴＵ／ｍｇ）低，但制成颗粒剂后（效价２２０ＩＴＵ／ｍｇ）比前者（效价１３０ＩＴＵ／ｍｇ）高。稻田应用０．８１ｇ／ｍ２剂量Ｂｔ－１８７漂浮颗粒剂控制中华按蚊幼虫，持效可达１６天，Ｂａｃｔｉｍｏｓ漂浮颗粒剂为１３天。     

球形芽孢杆菌C_（3－41）对嗜人按蚊和东乡伊蚊幼虫的毒性测定

本文报道球形芽孢杆菌Ｃ３－４１对嗜人按蚊和东乡伊蚊的毒性。实验室生物测定结果表明，ＢｓＣ３－４１液剂对嗜人按蚊Ⅳ龄幼虫处理后２４ｈ和４８ｈ的ＬＣ５分别为２．４０ｐｐｍ和１．７８ｐｐｍ，对东乡伊蚊的ＬＣ５０分别为５．３５ｐｐｍ和３．１４ｐｐｍ；持效为１～２周。Ｂｓ．Ｃ３－４１粉剂对嗜人按蚊和东乡伊蚊处理后２４ｈ的ＬＣ５０分别为３．３３ｐｐｍ和４．４４ｐｐｍ，处理后４８ｈ的ＬＣ５０分别为１．３６ｐｐｍ和１．４４ｐｐｍ。球形芽孢杆菌Ｃ３－４１处理蚊幼虫４８ｈ后的效果明显优于处理后２４ｈ的。     

球形芽孢杆菌C3—41对嗜人按蚊和东乡伊蚊幼虫的毒性测定

本文报道球形芽孢杆菌Ｃ３－４１对嗜人按蚊和东乡伊蚊的毒性，实验室生物测定结果表明，ＢｓＣ３－４１液剂对嗜人按蚊Ⅳ龄幼虫处理后２４ｈ和４８ｈ的ＬＣ５０分别为２．４０ｐｐｍ和１．７８ｐｐｍ，对东乡伊蚊的ＬＣ５０分别为５．３５ｐｐｍ和３．１４ｐｐｍ，持效为１～２周，Ｂｓ，Ｃ３－４１粉剂对嗜人按蚊和东乡伊蚊处理后２４ｈ的ＬＣ５０分别为３．３３ｐｐｍ和４．４４ｐｐｍ，处理后４８ｈ的ＬＣ５０分别为１．３６ｐｐ     

HCl—NaBH4—K3Fe（CN）6体系气态原子吸收光谱法测定饮料中铅

采用ＶＡ－９０气态原子化装置与ＷＦＸ－１Ｄ原子吸收分光光度计联用测定饮料中铅，采用ＨＣｌ－ＮａＢＨ４－Ｋ３Ｆｅ（ＣＮ）６体系，经Ｌ９（３４）正交试验选择最佳实验条件为：ＮａＢＨ４２０ｇ／Ｌ，Ｋ３Ｆｅ（ＣＮ）６１００ｇ／Ｌ，ＨＣｌ１．５ｍｌ，氩气流量为０．８Ｌ／ｍｉｎ。在０～１００μｇ／Ｌ范围内，相关系数ｒ＝０．９９９６，回收率为９４．１％～１０７．５％，Ｒ·Ｓ·Ｄ％＝３．３～５．２特征浓度和检出限分别为１．２９μｇ／Ｌ／１％和０．０４９μｇ／Ｌ。干扰试验表明，Ｓｎ、Ｈｇ、Ｃｒ、Ｃｕ、Ｍｎ在５００μｇ／Ｌ以下，Ｚｎ、Ａｓ、Ｆｅ、Ｎｉ、Ａｇ在１０００μｇ／Ｌ以下，不干扰测定     

广西吸毒成瘾者丙型肝炎病毒的感染及其分子生物学研究

选择２８３名静脉吸毒者（ＩＶＤＡｓ）和１２１名献血员（ＢＤｓ）进行Ａｎｔｉ－ＨＣＶ、ＨＣＶ血清基因型、ＨＣＶ基因型和ＨＣＶｃＤＮＡ序列的检测。结果表明，ＩＶＤＡｓ和ＢＤｓ的Ａｎｔｉ－ＨＣＶ检出率分别为９１．１７％和０．８３％；ＩＶＤＡｓ的ＨＣＶ血清基因型为１型８１．８５％（２２１／２７０），２型１．４８％（４／２７０），ｌ＋２型０．３７％（１／２７０），不能定为１和／或２型１６．３０％（４４／２７０）；ＨＣＶ基因型为１ａ型：２８．６％（３４／１１９）；ｌｂ型：３８．７％（４６／１１９）；２ａ型１０．９％（１３／ｌ１９）；２ｂ型１４．３％（１７／ｌ１９）；３ａ型２６．９％（３２／１１９）；３ｂ型４０．３％（４８／１１９）；６ａ型８．４％（１０／１１９）；６ｂ型２６．７％（３１／１１９）；其中１４．３％的病例有４～５种不同基因亚型的混合感染现象。     

球形芽孢杆菌C_（3－41）地方株制剂控制城市致乏库蚊的现场效果评价

笔者从１９９３年５月始在武汉市水果湖地区应用球形芽孢杆菌Ｃ（３－４１）地方株制剂，进行大面积控制致乏库蚊的现场研究。结果表明，用３ｍｌ／ｍ２球形芽孢杆菌Ｃ（３－４１）乳剂，对大型致乏库蚊孳生地每１０天处理１次，包括水塘、水沟、水槽及水坑；另用３ｇ／ｍ２块剂每月处理１次水缸和小容器等，可使幼虫密度下降３８～９９％，并能有效地控制成蚊密度和削平致乏库蚊成蚊的季节高峰。     

苏云金杆菌以色列变种漂浮块剂现场灭致乏库蚊效果

应用湖北省医学科学院寄生虫病防治研究所研制的苏云金杆菌以色列变种（Ｂｔｉ）漂浮块剂在现场进行了灭致乏库蚊的效果评价，室内生物测定结果表明；Ｂｔｉ漂浮块剂对致加蚊ＬＤ５０为０．５２０７μｇ／ｍｌ，效价为２３３Ｉ／ｍｌ，在０．４－０．８ｍ＾２现场水缸中，用１０ｇ／ｍ＾２的剂量，第一次投药持１０天出现２龄幼虫，第二次投药特效可保持１１天，因此每１０天投一次药可有效控制水缸中蚊幼虫孳生。     

Serum prolactin concentrations related to copper or inert intrauterine devices (IUDs) in women

A report that serum prolactin concentrations were almost doubled by the use of copper IUDs led us to study the effect of both copper and inert IUDs. We studied 105 normal women in whom all other prolactinergic factors had been excluded; 25 of them were using copper IUDs, 25 were using inert IUDs and there were 55 controls. No differences were found in the mean prolactin levels between these groups (4.3, 4.5 and 4.3 microgram/l, respectively). We conclude that copper and inert IUDs do not affect prolactin secretion.     

医用多参数监护仪的基本原是及使用

本文系统描述了多参数监护仪的定义，组成部分，工作原理，实施方法，及其使用当中的安全标准和领导高精尖领域的最新进展。     

Frequency of blood group antigens in Nigerian children with falciparum malaria.

The frequencies of the following blood group antigens: A, B, O, M, N, S, s, U, Fya, FyB, Lea, Jsa and K have been determined in Nigerian children with severe falciparum malaria. The frequency distribution of M, N, S, s, U, Fya and Fyb were not significantly different in children with life-threatening falciparum malaria and controls. The frequencies of A, B, O, Lea, Jsa and K found in the children with severe malaria were similar to those previously reported for healthy adults in this population. The Duffy blood group antigens Fya and Fyb were virtually absent from both infected and control children. This finding is in variance with a Fya frequency of 23% reported by Worlledge et al. (1974) for healthy adults in this population.     

A field trial of a single intramuscular injection of long-acting chloramphenicol in the treatment of meningococcal meningitis

During an epidemic of meningococcal meningitis 86 patients with symptoms and signs of meningitis were treated with a single intramuscular injection of a long-acting oily preparation of chloramphenicol (Tifomycine). Treatment was given by auxiliary medical staff who worked in four separate village dispensaries under the supervision of the local medical officer. The clinical response to treatment was satisfactory; 79 of 86 patients (92%) recovered fully with few residual disabilities. There were five deaths (5.8%) but a definite diagnosis of meningococcal meningitis was established in only one of these patients. Treatment was changed because of a poor clinical response in two further patients. Diagnosis was eventually proved in 45 patients (52%). The response to treatment of patients in this group was similar to that observed in the remaining 41 patients. The results of this preliminary study show that a single dose injection of a long-acting chloramphenicol is of value in the management of epidemics of meningococcal meningitis in rural areas because patients can be treated locally and early in their village dispensaries, thereby minimizing the need to transport them to urban hospitals which are often distant and congested.     

The sensitivity of Plasmodium falciparum to chloroquine and amodiaquine in Ibadan, Nigeria

An extended in vivo test of the sensitivity of Plasmodium falciparum to antimalarial drugs in Nigerian children showed no evidence of resistance to chloroquine and amodiaquine. However, the results of a small number of in vitro tests suggest a decreased sensitivity of the parasite to chloroquine when compared with the results of earlier studies in the same locality.