Is Tryptophan ‘more’ Essential than Other Essential Aminoacids in Development? A Morphologic Study

An ontogenetic study was designed on developing rats in uterus of mothers tryptophan deprived at day 1 (exp. 1) and day 14.5 (exp. 2) of conception to verify the supposed determining role of the serotoninergic system (SS) in sexual differentiation in mammals. Tryptophan-free feeding was pursued uninterruptedly in the litter after birth, during lactation and post-natal development. Tryptophan-free pregnant rats were obtained by exclusion of tryptophan sources from chow. In both exp. 1 and exp. 2, the litter showed at birth a significant physical under evolution that worsened, during post-natal development, to a much more marked dwarfism in exp. 1 pups. Growth hormone concentrations in both sexes of dwarf rats were lower than that in the control rats. At 30 days post-natal age, whereas exp. 1 female rats showed a right-timed onset of puberty, no descensus of testes could be observed in male rats of same experiment. Dwarf male rats showed an evident hypotrophy of the whole reproductive apparatus. In histological examination of testes, neither spermatogenesis nor Leydig cells have been observed. Moreover, dwarf female rats showed a pronounced hypotrophy of reproductive organs, but a normal puberal status pattern was evident. In exp. 2, litters showed a less pronounced dwarfism, but a normal right-timed onset of puberty in both male and female rats. Data indicate that role of tryptophan in physical and sexual maturation in both male and female rats is essential.     

Serological characterization of the new genotype E of small ruminant lentivirus in roccaverano goat flocks

Maedi visna virus (MVV) and caprine arthritis encephalitis virus (CAEV) are a heterogeneous group of infectious agents affecting sheep and goats. Due to their natural cross-species infection they are referred to as small-ruminant lentiviruses (SRLV). Recently a new genetic cluster, highly divergent from MVV and CAEV was identified in the north-west part of Italy. A panel of genotype E specific antigens was developed and evaluated in flocks infected with B1 and E strains. The results clearly indicate that a strain specific antigen is required to correctly identify animals infected with different genotypes.     

玉溪市野生动物驯养繁殖单位疫源疫病监测防疫情况初步研究

对玉溪市65家野生动物驯养繁殖单位的基本情况和疫源疫病监测防疫情况进行调查,收集数据进行汇总分析,从驯养繁殖种类及规模、技术人员配备、卫生防疫及消毒设施配备及消毒对象、人员防护、检疫、免疫、无害化处理、屠宰、信息档案等方面探讨玉溪市在野生动物驯养繁殖场所疫源疫病监测防疫中存在的风险和隐患.认为目前尚存在着对疫病传播的危害性认识不足,设施设备配置不全面,技术能力欠缺,尚未形成长期有效的监测防疫体系等问题,藉此提出加强宣传,增强意识;增加必要的投入;搭建技术平台,提供专业指导;完善监测防疫体系,形成长效机制等建议.     

旱作粳稻增产增收

从翻地、整地、农药、种子、肥料等方面对旱作水稻与常规水稻、旱作水稻与玉米进行经济效益比较。总结出旱作水稻所具有的省工省肥、耐盐碱、低投入高产出等特点,阐述了发展旱稻生产的意义。     

Carbon monoxide toxicity: a case series

Objective: To describe diagnostics, therapy, and sequelae of acute carbon monoxide (CO) toxicity because of a motor vehicle generator in 4 dogs and 2 cats. Series summary: Four dogs and 2 cats presented for recumbency, disorientation, dyspnea, and stiffness after an estimated 6–8 hour exposure to exhaust from a generator. Diagnostics included a serum carboxyhemoglobin levels evaluation, arterial blood gas analysis, pulse oximetry readings, and blood pressure measurements. Initial therapy included oxygen (O₂) administration, intravenous bronchodilators, fluids, and a hemoglobin‐based O₂ carrying (HBOC) molecule. Following administration of the HBOC, 4 of the 6 animals showed dramatic clinical improvement. Two weeks after hospital discharge, the owner reported potential hearing deficits in all animals. Brain auditory evoked response (BAER) tests were conducted in all surviving animals and some degree of hearing impairment was documented in all cases, with complete clinical resolution noted 6 weeks later. Unique information provided: This report describes the therapeutic use of an HBOC in acute isolated CO toxicity (i.e. without the complications of smoke inhalation). In addition, delayed nervous system dysfunction was documented in all surviving animals.