body temperature increase
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2022 ◽  
Vol 21 (1) ◽  
pp. 143-159
Author(s):  
K.M Alsaad

Fourty five local buffaloes naturally infected with A. marginal age of 2-5 years. Clinical signs, present parasireamia haematological and biochemical changes were studied. Thin thick blood smears Stained with Gimsas stain were used to identify the parasite. The results indicated that most of the infected were suffering from mild form of infection and the 1I11p01”l11I1E' clinical signs observed were mild rise of body temperature, increase respiratory and plus rate, weal: ruminal contraction and generalized weakness. Palcness and iteration of mucous membrane, loss appetite, nasal and ocular discharge, coughing, salivation, atarcp, constipation, diarrhea, and rccumbancy. Statistical analysis showc increase (P<0.01) in body temperature, respiratory and pulsera wlflc nigrrificant decrease (P<0.01) in ruminal contraction We. observed. Parasiteamia in infected animals ranged from 1.3- 5.2%. Values of red blood cell, haemoglobin and packed cell volume were significantly low (P<0.01). Total leulcocyric and neutrophils count was significantly increase (P<0.0l). and (P<0.05) respectively. Blood indices values showed a significant increase in (MCHC) (P<0.0l) while (MCV) values showed no difference, reticulocytes were also present mildly biochemical changes indicated higher levels of AST. Total bilirubin (P<0.01). Total protein concentration was less (P<0.01) and no difference was observed inALT and blood urea nitrogen levels between infected and control animals.


2021 ◽  
Vol 9 ◽  
Author(s):  
Gregory Lewis ◽  
Michael B. Bonsall

Fever is a response to infection characterised by an increase in body temperature. The adaptive value of this body temperature increase for endotherms is unclear, given the relatively small absolute temperature increases associated with endotherm fever, its substantial metabolic costs, and the plausibility for pathogens to adapt to higher temperatures. We consider three thermal mechanisms for fever's antimicrobial effect: (1) direct growth inhibition by elevating temperature above the pathogens optimal growth temperature; (2) further differentiating the host body from the wider environment; and (3) through increasing thermal instability of the pathogen environment. We assess these by modelling their effects pathogen on temperature dependent growth, finding thermal effects can vary from highly to minimally effective depending on pathogen species. We also find, depending on the specification of a simple physical model, intermittent heating can inhibit pathogen growth more effectively than continuous heating with an energy constraint.


2020 ◽  
Vol 98 (10) ◽  
pp. 6-10
Author(s):  
M. F. Gubkina ◽  
I. Yu. Petrakova ◽  
N. V. Yukhimenko ◽  
S. S. Sterlikova ◽  
Yu. Yu. Khokhlova ◽  
...  

The objective: to analyze the course of the new coronavirus infection (COVID-19) in children with active respiratory tuberculosis. Subjects and methods. The article describes results of retrospective analysis of the course of the new coronavirus infection in 25 children (3-12 years old) with active respiratory tuberculosis during the outbreak of COVID-19 in an in-patient TB unit.Results. 24 (96%) persons got infected after the close exposure to the coronavirus infection, and 1 (4%) child didn't get infected. The diagnosis was verified by polymerase chain reaction (detection of RNK of SARS-CoV-2) in 33.3%, by enzyme immunoassay (detection of IgG antibodies to SARS-CoV-2 in 1 month after quarantine removal) in 100%. 58.3% of children with respiratory tuberculosis (14 people) infected with coronavirus infection had minimal respiratory symptoms, that did not differ from signs of other respiratory viral infections; clinical manifestations of the disease were completely absent in 41.7% (10) patients. Coronavirus pneumonia was diagnosed in 4 (16.7%) children who suffered from COVID-19, they had no clinical signs of lower respiratory tract disorders and no body temperature increase; 3 patients had no signs of respiratory viral infection; in all cases, the lung damage detected by computed tomography didn't exceed 10%. In 2 months after the removal of quarantine, no IgG antibodies to SARS-CoV-2 were detected in 2 out of 10 examined children (20.0%), thus there was a chance for re-infection. No mutual aggravating effect of coronavirus infection and tuberculosis was revealed in their combination over the entire observation period (4 months).


Biomolecules ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 842
Author(s):  
Placido Illiano ◽  
Gregory E. Bigford ◽  
Raul R. Gainetdinov ◽  
Marta Pardo

The activity of the hypothalamus–pituitary–adrenal (HPA) axis is pivotal in homeostasis and presides the adaptative response to stress. Dopamine Transporter (DAT) plays a key role in the regulation of the HPA axis. We used young adult female DAT Knockout (KO) rats to assess the effects of DAT ablation (partial, heterozygous DAT+/-, or total, homozygous DAT-/-) on vulnerability to stress. DAT-/- rats show profound dysregulation of pituitary homeostasis, in the presence of elevated peripheral corticosterone, before and after acute restraint stress. During stress, DAT-/- rats show abnormal autonomic response at either respiratory and cardiovascular level, and delayed body temperature increase. DAT+/- rats display minor changes of hypophyseal homeostatic mechanisms. These rats display a similar pituitary activation to that of the control animals, albeit in the presence of higher release of peripheral corticosterone than DAT-/- after stress, and reduced temperature during stress. Our data indicate that DAT regulates the HPA axis at both the central and peripheral level, including autonomic function during stress. In particular, the partial deletion of DAT results in increased vulnerability to stress in female rats, which display central and peripheral alterations that are reminiscent of PTSD, and they might provide new insights in the pathophysiology of this disorder.


2020 ◽  
Vol 21 (9) ◽  
pp. 3143 ◽  
Author(s):  
Keun-Yeong Jeong

Capsaicin is the active component of chili peppers and is a hydrophobic, colorless, odorless, and crystalline to waxy compound. The transient receptor potential vanilloid 1 (TRPV1) is the capsaicin receptor channels that are involved in a variety of functions like transduction and transmission of the physiological stimulus. Subcutaneous injection of capsaicin to a newborn rat leads to involuntary lifelong TRPV1 desensitization. Various physiological changes including sensory and homeostatic actions in the body associated with neonatal capsaicin treatment are induced by direct TRPV1 channel targeting. Interesting changes include unique phenomena such as the reduction in pain perception, abnormal body temperature, increase in infection, infectious or neuropathological itching, and irregular circadian core body temperature rhythm. These symptoms are associated with relatively higher fever or loss of sensory c-fiber related to TRPV1 desensitization. The aforementioned outcomes not only provide a warning about the risk of capsaicin exposure in newborns but also indicate the possible occurrence of relatively rare diseases that are difficult to diagnose. Therefore, Therefore, the present review aims to summarize the unique phenomena caused by systemic capsaicin administration in neonatal rats.


Animals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 673
Author(s):  
Janice Baker ◽  
Mallory DeChant ◽  
Eileen Jenkins ◽  
George Moore ◽  
Kathleen Kelsey ◽  
...  

Body temperature responses were recorded during phases of work (waiting-to-work in close proximity to search site, active work in a search site, and post-work recovery crated in vehicle) in human remains detection dogs during search training. State or federally certified human remains detection dogs (n = 8) completed eight iterations of searching across multiple novel search environments to detect numerous scent sources including partial and complete, buried, hidden, or fully visible human remains. Internal temperature (Tgi) of the body was measured continuously using an ingestible thermistor in the gastrointestinal tract. Mean total phase times were: waiting-to-work: 9.17 min (±2.27); active work: 8:58 min (±2:49); and post-work recovery: 24:04 min (±10.59). Tgi was impacted by phase of work (p < 0.001) with a small increase during active work, with mean peak temperature 39.4 °C (±0.34 °C) during that period. Tgi continued to increase for a mean of 6:37 (±6:04) min into the post-work recovery phase in the handler’s vehicle with a mean peak Tgi of 39.66 °C (±0.41 °C). No significant increase in temperature was measured during the waiting-to-work phase, suggesting behaviors typical of anticipation of work did not appear to contribute to overall body temperature increase during the waiting-to-work recovery cycle. Continued increase of gastrointestinal body temperature several minutes after cessation of exercise indicates that risk of heat injury does not immediately stop when the dog stops exercising, although none of the dogs in this study reached clinically concerning body temperatures or displayed any behavioral signs suggestive of pending heat injury. More work is needed to better understand the impact of vehicle crating on post-work recovery temperatures in dogs.


Author(s):  
Janice Baker ◽  
Mallory DeChant ◽  
Eileen Jenkins ◽  
George Moore ◽  
Kathleen Kelsey ◽  
...  

Body temperature responses were recorded during phases of work (waiting to work in close proximity to search site, active work in a search site, and post-work recovery crated in vehicle) in human remains detection dogs during search training. State or federally certified human remains detection dogs (n = 8) completed eight iterations of searching, rotating through six different types of search environments to detect numerous scent sources including partial and complete, buried, hidden, or fully visible human remains. Internal temperature (Tgi) of the body was measured continuously using an ingestible thermistor in the gastrointestinal tract. Mean total phase times were: waiting to work: 9.17 minutes (&plusmn; 2.27); active work: 8:58 minutes (&plusmn; 2:49); and post work recovery: 24:04 minutes (&plusmn; 10.59). Tgi was impacted by phase of work (P &lt; 0.001) with a small increase during active work, with mean peak temperature 39.4 &deg;C (&plusmn; 0.34 &ordm;C) during that period. Tgi continued to increase for a mean of 7:37 (&plusmn; 6:04) minutes into the post-work recovery phase in the handler&rsquo;s vehicle with a mean peak Tgi of 39.66 &deg;C (&plusmn; 0.41 &ordm;C). No significant increase in temperature was measured during the waiting to work phase, suggesting anticipation of work did not appear to contribute to overall body temperature increase during the waiting to work recovery cycle. Continued increase of gastrointestinal body temperature several minutes after cessation of exercise indicates that risk of heat injury does not immediately stop when the dog stops exercising, although none of the dogs in this study reached clinically concerning body temperatures or displayed any behavioral signs suggestive of pending heat injury. More work is needed to better understand the impact of vehicle crating on post-work recovery temperatures in dogs.


2020 ◽  
pp. jramc-2019-001253 ◽  
Author(s):  
Jo Corbett ◽  
J Wright ◽  
M J Tipton

Women can now serve in ground close combat (GCC) roles, where they may be required to operate alongside men in hot environments. However, relative to the average male soldier, female soldiers are less aerobically fit, with a smaller surface area (AD), lower mass (m) with higher body fat and a larger AD/m ratio. This increases cardiovascular strain, reduces heat exchange with the environment and causes a greater body temperature increase for a given heat storage, although a large AD/m ratio can be advantageous. Physical employment standards for GCC roles might lessen the magnitude of fitness and anthropometric differences, yet even when studies control for these factors, women sweat less than men at high work rates. Therefore, the average female soldier in a GCC role is likely to be at a degree of disadvantage in many hot environments and particularly during intense physical activity in hot-arid conditions, although heat acclimation may mitigate some of this effect. Any thermoregulatory disadvantage may be exacerbated during the mid-luteal phase of the menstrual cycle, although the data are equivocal. Likewise, sex differences in behavioural thermoregulation and cognition in the heat are not well understood. Interestingly, there is often lower reported heat illness incidence in women, although the extent to which this is influenced by behavioural factors or historic differences in role allocation is unclear. Indeed, much of the extant literature lacks ecological validity and more work is required to fully understand sex differences to exercise heat stress in a GCC context.


2019 ◽  
Author(s):  
Dumitru Erhan ◽  

The aim research was to established specific clinical symptoms and changes of hematological and biochemical indices in the experimental bovine sarcocistoza. The results of the tests show that the experimental infestation of calves with Sarcocystis bovicanis sporocysts in dose of 200-250 thousands, disease manifests clinically but more pronounced is on the 25-30 days after infestation, which coincides with the development of schizogonic stages when appearing massively schizonts. On the 64th day (observation period), the condition of the animals improves, which corresponds to the step of introducing the sporochysts into the muscles. Have been established three periods of body temperature increase at the calves: on 5-7, 15-17 and 25-30th days after experimental infestation. At the infected calves have been identified changes in hematological and biochemical indices in blood. From the first days after infestation, a decrease in serum total proteins has been established, hypoalbuminemia - albumin content on the 30th day after infection is reduced with 27.7% compared to baseline (until infestation). The activity of alkaline phosphatase and aldolase increases about 2-times, and aspartataminotransferaza and alanine aminotransferase by- 2-3 times.


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