Isolation of Neospora caninum from a calf in Malaysia.

In order to attempt isolate the protozoan parasite Neospora caninum, an N. caninum seropositive pregnant Sahiwal Friesian cross heifer from a large-scale dairy farm in Malaysia was kept for observation until parturition at the Veterinary Research Institute, Ipoh. The heifer gave birth to a female calf that was weak, underweight and unable to rise. Precolostral serum from the calf had an N. caninum indirect fluorescent antibody test titre of 1:3200. It died 12 h after birth and necropsy was performed. Brain homogenate from the calf was inoculated into 10 BALB/c mice that were kept for 3 months after which brain tissue from the mice was inoculated onto 24 h fresh monolayer Vero cell lines. The cell cultures were examined daily until growth of intracellular protozoa was observed. DNA of the organisms from the cell cultures was analyzed by PCR and DNA sequencing. DNA fragments of the expected size were amplified from the isolate using N. caninum-specific primers, and sequence analysis of ITS1 clearly identified the isolate as N. caninum. This is the first successful isolation of N. caninum from a bovine in Malaysia, and the isolate is designated Nc-MalB1.

Epidemiology of Trypanosoma evansi infection in crossbred dairy cattle in Malaysia.

An investigation into the epidemiology of Trypansoma evansi infection in crossbred dairy cattle was conducted for a period of 12 months on a dairy cattle farm in Penninsular Malaysia. The prevalence of parasitaemia was highest in lactating animals (13.4%), followed by those in the dry herd (8.8%), late pregnant animals (8.1%), early pregnant animals (4.7%), calves (0.3%) and heifers (0.2%). The prevalence of antigenaemia was highest in the lactating animals (54.7%), followed by that in dry animals (53.7%), heifers (51.1%), late pregnant animals (47.7%), early pregnant animals (46.5%) and calves (24.2%).

The impact of clinical guidelines and clinical pathways on medical practice: effectiveness and medico-legal aspects.

The 1990s will be remembered as a decade when quality assurance, evidence-based medicine and clinical quality improvement became key issues in the delivery of health care in hospitals and community settings. As public expectations of high quality health care increase in the face of diminishing resources and as accountability and standardisation of clinical practice are demanded by both consumers and professional regulatory bodies, the medical profession has responded with a proliferation of clinical practice guidelines and pathways. The efforts have been spearheaded by the various professional and academic colleges. Despite all the enthusiasm that has been created, there is still uncertainty regarding the clinical effectiveness, validity and medico-legal effects of practice guidelines and clinical pathways. This article focuses on the reasons behind the increasing popularity of clinical guidelines and pathways, a critical appraisal of their effectiveness and the medico-legal implications, effects and consequences of implementing such guidelines in clinical practice.

Clinical pathways--the new paradigm in healthcare?

A clinical pathway defines the optimal care process, sequencing and timing of interventions by doctors, nurses and other healthcare professionals for a particular diagnosis or procedure. It is a relatively new clinical process improvement tool that has been gaining popularity across hospitals in the USA, Australia and United Kingdom. Clinical pathways are developed through collaborative efforts of clinicians, nurses, pharmacists, physiotherapists and other allied healthcare professionals with the aim towards improving the quality of patient care. Clinical pathways have been shown to reduce unnecessary variation in patient care, reduce delays in discharge through more efficient discharge planning, and improve the cost-effectiveness of clinical services. The approach and objectives of clinical pathways are consistent with those of total quality management (TQM) and continuous quality improvement (CQI) and is essentially the application of these principles to the patient's bedside. This article examines the proliferation in the use of clinical pathways, its benefits to the healthcare organisation, its application as a tool for CQI activities in direct relation to patient care and the medico-legal implications involved.

Epidemiology of gastro-intestinal nematodes of sheep in wet tropical conditions in Malaysia.

A study on the seasonal variations in the population structure of Haemonchus contortus and Trichostronglyus colubriformis was conducted for a period of 12 months in a typical large scale sheep farm on improved pasture in Peninsular Malaysia which has a wet tropical climate. Successive groups of helminth-free tracer lambs were grazed for 4 weeks together with naturally infected sheep and were necropised for worm counts 2 weeks after their removal from the pasture. The monthly populations of H. contortus fluctuated slightly except in May and August during which more worms were found in the tracer animals. The numbers of T. colubriformis were comparatively high from October to December 1992 and again in March 1993, low during April and June 1992. Small numbers of hypobiotic larvae of H. contortus were detected in the tracer animals. Development and survival of infective larvae of H. contortus and T. colubriformis on pasture were investigated by spreading faeces containing eggs on grass plots in October 1993, February and May 1994. Development of the eggs to the infective larvae occurred within one week and their survival times were 7 weeks in the 3 experiments. The potential for control by rotational grazing is discussed.