AIM This study was conducted to evaluate the impact of hot dry, hot humid and comfortable season on physiological, hematological, biochemical, and oxidative stress parameters in Surti buffaloes. MATERIALS AND METHODS Ten lactating Surti buffaloes of similar physiological status were selected. Based on the temperature-humidity index (THI), their natural exposure to the environment was categori...

Heat stress in laying hens is prompted by combinations of environmental temperature and humidity that prevent the bird’s thermoregulatory process from effectively dissipating the heat produced during metabolism [32]. High environmental temperature is the major problem faced by laying hens as well as poultry farmers usually in summer months. The ideal temperature for laying hens is about 20°C [2...

A critical review of the literature provides the basis for an analysis of the effects of thermal stress on human performance. Research in this area to date reflects a wide divergence of opinion regarding the magnitude, direction and significance of performance changes occurring under conditions of high temperature, humidity, solar radiation, etc. An attempt to resolve major conflicts in experim...

Tunisia has a Mediterranean climate characterized by high ambient temperatures for a long period. Thus, one of the challenges to dairy producers is heat stress. The objectives of this work were to characterize the environmental conditions to which Holstein cows are exposed in Tunisia using the Temperature Humidity Index (THI), examine heat stress effects on lactating cows and to suggest potenti...

Cerebral ischaemia is considered to be an important cause of central nervous system dysfunction in heat stress. We hypothesized that heat stress would alter the reactivity of isolated carotid artery to vasoactive agents. Carotid arteries were isolated from broiler chickens maintained either at 23-24 degrees C with 55-65% humidity (control conditions) or exposed to 40 +/- 1 degrees C with 35% hu...

A re-evaluation of the temperature humidity index (THI) confirmed that current THI values underestimate the severity of heat stress levels. Previously, a THI equal to or greater than 72 has been used to define onset of heat stress, but our research demonstrated that a THI greater than or equal to 68 is low enough to cause adverse affects when cows suffer from heat stress. Furthermore, we were a...

The purpose of the investigation was to establish how the pineal-adrenal axis plays an important role in thermoregulation in female goats under short-term heat stress. The study was conducted to observe the influence of glucocorticoids on pineal function in goats and its influence on stress alleviation capability. Melatonin and glucocorticoid secretions and several other endocrine and biochemic...

The transurethral resection of the prostate (TURP) syndrome is a severe vascular hypotension reaction that complicates endoscopic surgery as a result of massive irrigating fluid absorption causing a drop of serum sodium concentration of >15mmol/l inducing severe acute dilution hyponatraemia (HN) of <120mmol/l [1]. Volumetric Overload Shock (VOS) is a condition caused by massive fluid infusions ...