Infrared thermography as a non-invasive method for the evaluation of heat stress in pigs kept in pens free of cages in the maternity

Ricci, Gisele Dela; Miranda, Késia Oliveira da Silva; Titto, Cristiane Gonçalves

doi:10.1016/j.compag.2019.01.017

Cited by 22 publications

(10 citation statements)

References 32 publications

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“…However, the body surface temperature obtained with T camera give significantly (p<0.01) lower readings compared to the rectal temperature. Similar finding was reported in various studies earlier (4,18,19,24,25) . The temperature recorded by T camera at base of the ear, inner thigh and eye were found to be significantly (p<0.01) higher among other parts of the body in the study confirmed earlier work (17,20) .Higher surface temperature at these sites could be due to the thinner skin and lower subcutaneous fat thickness resulting in greater heat dissipation from these sites.…”

Section: Resultssupporting

confidence: 93%

Assessment of Rectal Temperature using Infrared Thermal Camera in Pigs

Kadirvel¹,

Gonmei²,

Singh³

2022

IJST

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Objective: To develop substitute measures for assessing accurate Rectal Temperature with an Infrared Thermal Imaging Camera in pigs. Methods: In the experiment, three different genetic groups were used: Hampshire, crossbred (Hampshire X Niang-Megha) and Niang-Megha. Apparently healthy 90 adult pigs (1-3 years) consisting 30 numbers from different group were used for each season; namely, summer (July) and winter (December). Thermal images were taken at different anatomical body sites. Appropriate anatomical sites were selected based on close association with rectal temperature (T rectal ). Developed a constant correction factors (CF) as a substitute measures using selected sites and validated for assessing accurate T rectal . Findings: Base of the Ear Temperature (T ear ) and Eye Temperature (T eye ) were highly correlated with T rectal . The correction factor was developed as substitute measures for assessing rectal temperature using base of the ear and eye temperature. Accordingly, the rectal temperature was recorded ranging from 36.45 to 38.25 • C with T ear and 35 to 38.2 • C with T eye based on the developed correction factor. Novelty: Developed correction factors as a substitute measures for accurate assessment of rectal temperature by non-invasive techniques by measuring base of the ear and eye temperature with an infrared thermal imaging camera.

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Section: Resultssupporting

confidence: 93%

Assessment of Rectal Temperature using Infrared Thermal Camera in Pigs

Kadirvel¹,

Gonmei²,

Singh³

2022

IJST

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“…While the presence of this inspired vapor is undoubtedly a drawback regarding the usefulness of this thermal window, it can also be considered an advantage because it permits quantifying other parameters, such as respiratory rate. Ricci et al's ( 19 ) 7-day study of 26 pregnant sows collected data on the parameters of respiratory rate and rectal temperature together with IRT readings from the nasal window (from a distance of 1 and 1.5 m) in the morning and at night. The animals showed a moderate correlation between nasal temperature and respiratory rate ( r = 0.350), meaning that as the temperature of the nasal region increases, the respiratory rate increases due to tachypnea as a thermoregulatory compensation mechanism, although there is no direct relationship between these two variables.…”

Section: Infrared Thermography (Irt) As a Tool To Evaluate The Therma...mentioning

confidence: 99%

“…Infrared thermography (IRT) is used to measure the amount of heat that a body radiates ( 17 , 18 ) as a result of vasomotor control that dilates or constricts peripheral capillaries ( 8 ). The discovery of this relationship suggested that IRT could be useful in veterinary medicine to evaluate circulatory changes caused by inflammatory or infectious processes, wounds, thermal stress, and stressful events ( 19 ). IRT could help perform detailed analyses of thermoregulation and the compensation mechanisms involved in returning to a state of homeothermy.…”

Section: Introductionmentioning

confidence: 99%

Thermoregulation mechanisms and perspectives for validating thermal windows in pigs with hypothermia and hyperthermia: An overview

et al. 2022

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Specific anatomical characteristics make the porcine species especially sensitive to extreme temperature changes, predisposing them to pathologies and even death due to thermal stress. Interest in improving animal welfare and porcine productivity has led to the development of various lines of research that seek to understand the effect of certain environmental conditions on productivity and the impact of implementing strategies designed to mitigate adverse effects. The non-invasive infrared thermography technique is one of the tools most widely used to carry out these studies, based on detecting changes in microcirculation. However, evaluations using this tool require reliable thermal windows; this can be challenging because several factors can affect the sensitivity and specificity of the regions selected. This review discusses the thermal windows used with domestic pigs and the association of thermal changes in these regions with the thermoregulatory capacity of piglets and hogs.

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“…Focusing on livestock, the infrared technology can be used, for example, to detect mastitis in cows [51] and sheep [125], lameness in dairy cows [126] and sheep [127], ectoparasites in cattle [128,129], measure surface temperature in ewes during the estrous cycle [130] or detect estrus and ovulation in cows [131], measure febrile states after vaccination in pigs [132], diagnose respiratory diseases in pigs [133] and calves [134], assess body surface temperature in sows and piglets [135], thermographically examine the musculoskeletal system during race training in young thoroughbreds [136], assess stress in broilers [137], detect responses to handling stimuli in cattle [138], assess semen quality in bulls [139]; it can be used as an indicator of meat quality and also to evaluate stressors acting on animals before slaughter [140]. All in all, IRT can be used to assess the welfare of livestock [141].…”

Section: Use Of Irt In Livestock Productionmentioning

confidence: 99%

Application of the Machine Vision Technology and Infrared Thermography to the Detection of Hoof Diseases in Dairy Cows: A Review

et al. 2021

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Infrared thermography (IRT) is a noninvasive and safe method of displaying the temperature map of objects that can be used to detect hoof diseases and lameness to reduce significant financial costs and physically stress animals. A qualitative bibliometric method based on the analysis of publications by the authors themselves using sophisticated tools of scientific databases was applied in this work. This review presents the fundamentals of IRT as well as recent developments in IRT detection in dairy science, including preprocessing, segmentation, and classification of objects in IRT images. In addition, recent studies dealing with the detection of hoof diseases and lameness using IRT are reviewed. As a result of this study, select previous studies are confronted in terms of technical aspects of IRT measurements such as emissivity, distance, temperature range, and reflected air temperature. Subsequently, recommendations for future IRT measurements are discussed.

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Infrared thermography as a non-invasive method for the evaluation of heat stress in pigs kept in pens free of cages in the maternity

Cited by 22 publications

References 32 publications

Assessment of Rectal Temperature using Infrared Thermal Camera in Pigs

Assessment of Rectal Temperature using Infrared Thermal Camera in Pigs

Thermoregulation mechanisms and perspectives for validating thermal windows in pigs with hypothermia and hyperthermia: An overview

Application of the Machine Vision Technology and Infrared Thermography to the Detection of Hoof Diseases in Dairy Cows: A Review

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