Related Experiment Video
Updated: May 11, 2026
04:34
Mouse Body Temperature Measurement Using Infrared Thermometer During Passive Systemic Anaphylaxis and Food Allergy Evaluation
Published on: September 14, 2018
Rectal temperature as an indicator for heat tolerance in chickens
Xing Y Chen1, Pei P Wei, Shen Y Xu
1College of Animal Science and Technology, Anhui Agricultural University, Hefei, China.
Animal Science Journal = Nihon Chikusan Gakkaiho
|May 3, 2013
Summary
High environmental temperature negatively impacts poultry production. This study identified the early rectal temperature increase (ΔT18) as a reliable indicator for selecting heat-tolerant chickens, crucial for improving poultry resilience in hot climates.
Area of Science:
- Animal Science
- Environmental Physiology
- Poultry Production
Background:
- High environmental temperatures pose a significant challenge to poultry production in tropical and subtropical regions.
- Understanding chicken adaptive responses to heat stress is critical for maintaining productivity and animal welfare.
- Identifying reliable indicators for heat tolerance can aid in selective breeding programs.
Purpose of the Study:
- To investigate the adaptive responses of chickens to acute high ambient temperatures.
- To identify suitable physiological indicators for selecting heat-tolerant individual chickens.
Main Methods:
- Anak-40 pullets were subjected to a controlled heat stress protocol, increasing ambient temperature from 24-28°C to 35°C, then to 41°C.
- Rectal temperature (RT) was monitored at multiple time points (0-66 hours).
- Heat Stress Survival Time (HSST) and Lethal Rectal Temperatures (LRT) were recorded; temperature differentials (ΔTn, ΔTT) were calculated.
Main Results:
- A significant negative correlation was observed between HSST and temperature differentials (ΔTn, ΔTT), indicating that larger temperature increases correlated with shorter survival times.
- Pullets exhibiting a lower increase in rectal temperature at 18 hours (ΔT18) demonstrated significantly longer HSST compared to those with a higher ΔT18.
- The ΔT18 was found to be a reliable indicator, with low ΔT18 values associated with greater heat resistance.
Conclusions:
- The early increment in rectal temperature (ΔT18) under heat stress serves as a dependable indicator for assessing heat tolerance in chickens.
- Utilizing ΔT18 in selection programs can facilitate the development of more heat-resilient poultry breeds, mitigating production losses in hot climates.
Related Concept Videos
01:27Assessing Body Temperature - Rectal
Rectal temperature measurement is considered the most precise method for assessing core body temperature and typically registers higher than oral temperature. For adults, the rectal thermometer should be inserted 1 to 1.5 inches into the rectum to obtain the most accurate reading.
Follow these steps for rectal temperature assessment:
Step 1: Perform hand hygiene and don clean gloves to prevent cross-infection.
Step 2: Position the patient in a side-lying position to better visualize the rectal...
Follow these steps for rectal temperature assessment:
Step 1: Perform hand hygiene and don clean gloves to prevent cross-infection.
Step 2: Position the patient in a side-lying position to better visualize the rectal...
01:14Assessing Body Temperature - Axilla
Procedural Guide for Assessing Axillary Body Temperature using a Digital Thermometer:
Step 1: Perform hand hygiene and put on clean gloves to maintain infection control and prevent cross-contamination.
Step 2: Prepare the patient by explaining the procedure to ensure understanding and cooperation. Ensure privacy, expose the axilla, and inform the patient that minimal movement is crucial for an accurate reading.
Step 3: Adjust the patient’s clothing to expose only the axilla. It minimizes...
Step 1: Perform hand hygiene and put on clean gloves to maintain infection control and prevent cross-contamination.
Step 2: Prepare the patient by explaining the procedure to ensure understanding and cooperation. Ensure privacy, expose the axilla, and inform the patient that minimal movement is crucial for an accurate reading.
Step 3: Adjust the patient’s clothing to expose only the axilla. It minimizes...
01:14Assessing Body Temperature - Oral
Here are the steps to accurately measure oral temperature using an electronic thermometer:
Step 1:
Start by practicing proper hand hygiene to prevent the spread of microorganisms.
Step 2:
Take the thermometer out of the charging unit, switch it on, and wait for the ready sign.
Step 3:
Gently slide the probe cover until a click is heard. This simple action prevents cross-contamination and ensures the correct placement of the probe cover.
Step 4:
Instruct the patient to open their mouth and place...
Step 1:
Start by practicing proper hand hygiene to prevent the spread of microorganisms.
Step 2:
Take the thermometer out of the charging unit, switch it on, and wait for the ready sign.
Step 3:
Gently slide the probe cover until a click is heard. This simple action prevents cross-contamination and ensures the correct placement of the probe cover.
Step 4:
Instruct the patient to open their mouth and place...
01:14Temperature Measurement Sites
A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
01:19Assessing Body Temperature - Temporal Artery
Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.
Step 3: Assess the patient's forehead...
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.
Step 3: Assess the patient's forehead...
01:14Assessing Body Temperature - Tympanic membrane
Assessing tympanic membrane temperature involves using a tympanic membrane thermometer (TMT). Here is a step-by-step guide:
Step 1: Begin by practicing good hand hygiene to prevent the transmission of microorganisms.
Step 2: Turn on the thermometer and wait until the ready sign appears on the screen to ensure accurate measurement.
Step 3: Slide the probe cover in place to prevent cross-contamination.
Step 4: Instruct the patient to tilt their head to the side for comfort and check for cerumen...
Step 1: Begin by practicing good hand hygiene to prevent the transmission of microorganisms.
Step 2: Turn on the thermometer and wait until the ready sign appears on the screen to ensure accurate measurement.
Step 3: Slide the probe cover in place to prevent cross-contamination.
Step 4: Instruct the patient to tilt their head to the side for comfort and check for cerumen...