Omicron COVID-19 Case Estimates Based on Previous SARS-CoV-2 Wastewater Load, Regional Municipality of Peel, Ontario, Canada.

We determined correlations between SARS-CoV-2 load in untreated water and COVID-19 cases and patient hospitalizations before the Omicron variant (September 2020-November 2021) at 2 wastewater treatment plants in the Regional Municipality of Peel, Ontario, Canada. Using pre-Omicron correlations, we estimated incident COVID-19 cases during Omicron outbreaks (November 2021-June 2022). The strongest correlation between wastewater SARS-CoV-2 load and COVID-19 cases occurred 1 day after sampling (r = 0.

Diagnostic laparoscopy for suspected appendicitis: only useful in young women.

The clinical diagnosis of acute appendicitis is inaccurate and can be associated with a negative appendicectomy rate in excess of 40%. The latter has an attendant, albeit low, potential for increased morbidity and mortality, particularly related to infection. In this two year prospective audit of 282 patients presenting with the symptoms and signs of acute appendicitis, preliminary diagnostic laparoscopy (PDL) was performed on 145 patients with the remainder (137) proceeding directly to open appendicectomy.

Effects of volume control, pressure control, and pressure-regulated volume control on cardiopulmonary parameters in a normal rat lung.

The purpose of this study was to investigate the differences in diaphragm shortening and cardiopulmonary parameters at varying tidal volumes during volume control (VC), pressure control (PC), and pressure-regulated volume control (PRVC). A miniaturized ultrasonic sensor attached to the inferior surface of the upper costal surface of the right hemidiaphragm of 16 Sprague-Dawley rats provided a direct assessment of diaphragm shortening. Within each control mode of mechanical ventilation, the tidal volume was increased from 3 to 12 ml in increments of 3 ml.

The day treatment program: meeting rehabilitation needs for SCI in the changing climate of health care reform.

Life expectancy for persons with spinal cord injury (SCI) is somewhat below normal but continues to increase (Devivo & Stover, 1994). Therefore, rehabilitation nurses must develop a way to provide interventions over an entire lifespan for the person with SCI. One setting in which to implement care is the day treatment program, and rehabilitation nurses can be a part of this new care delivery model (Stevens, 1994).

Serosal imprint cytology in colonic cancer: a simple staging technique.

Accurate staging of colonic cancer is essential in defining the rational use of adjuvant treatments. Recent studies have shown that prognostic accuracy can be significantly improved by recognition of primary tumour extension to the free serosal surface. This study compares the technical results of serosal imprint cytology with the results of histology in assessing serosal involvement.

A six year prospective study of fibrinogen and other risk factors associated with mortality in stable claudicants.

A total of 333 patients with stable intermittent claudication at recruitment were followed up for 6 years to determine risk factors associated with subsequent mortality. Cardiovascular diseases were the underlying cause of death in 78% of the 114 patients who died. The strongest independent predictor of death during the follow-up period was the plasma fibrinogen level, an increase of 1 milligram being associated with a nearly two-fold increase in the probability of death within the next 6 years.

Episodic intermittent claudication associated with a Baker's cyst.

Baker first described synovial cysts in the leg in connection with diseases of the knee joint. Whilst the majority are asymptomatic, some present as a localised swelling behind the knee, and others either compress the popliteal vein or rupture and can be misdiagnosed as deep vein thrombosis; transmitted pulsation through the cyst can suggest the presence of a popliteal aneurysm. This paper documents a case of intermittent claudication of the lower limb secondary to compression of the popliteal artery by a Baker's cyst.

Idiopathic scrotal calcinosis: a possible aetiology reaffirmed.

Idiopathic scrotal calcinosis is characterised by the presence of multiple firm scrotal nodules of unknown or disputed aetiology. Only 55 cases have been reported in the literature since the first description by Lewinski (1883). We report an additional five patients.

Bacterial colonisation of leg ulcers and its effect on the success rate of skin grafting.

There is little information on the immediate and long-term results of skin grafting to chronic lower limb ulcers. Our experience in their management had led us to analyse, retrospectively, the results of split thickness skin grafts applied to lower limb ulcers in 88 consecutive patients. Graft take has been related to bacterial growth from ulcer swabs taken on admission, preoperatively and postoperatively.

The effects of ethionine administration and choline deficiency on protein carboxymethylase activity in mouse pancreas.

Protein carboxymethylase of mouse pancreas is both soluble (70%) and particulate (30%). The Km for S-adenosylmethionine is 7.5 x 10(-7) M and the Ki for S-adenosylethionine is 1.

Parallel secretion of enzymes by the rabbit pancreas.

1. The purpose of this study was to determine whether or not the secretion of pancreatic enzymes by the rabbit remained proportional (parallel) after acute stimulation. 2.

Rheology of human blood, near and at zero flow. Effects of temperature and hematocrit level.

Static normal human blood possesses a distinctive yield stress. When the yield stress is exceeded, the same blood has a stress-shear rate function under creeping flow conditions closely following Casson's model, which implies reversible aggregation of red cells in rouleaux and flow dominated by movement of rouleaux. The yield stress is essentially independent of temperature and its cube root varies linearly with hematocrit value.