Livestock Mortality
Livestock Mortality - Related Videos
08:59
Laser-assisted Cytoplasmic Microinjection in Livestock Zygotes
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Cited by 25 •
2016
This protocol shows how to perform cytoplasmic microinjection in farm animal zygotes. This technique can be used to deliver any solution into the one-cell embryo such as genome editing tools to generate knockout animals.
03:57
Assessing Pathogenic Bacteria–Induced Mortality in C. elegans Larvae
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2025
Source: Anderson, Q. L., et al. A High-throughput, High-content, Liquid-based C. elegans Pathosystem. J. Vis. Exp. (2018)The video demonstrates a liquid-based assay where genetically modified C. elegans larvae are exposed to pathogenic bacteria in a microplate. Bacterial toxins secreted into the medium induce host stress and death. A fluorescent dye stains dead worms, allowing imaging-based quantification of mortality to assess genetic susceptibility or resistance.
07:03
Reliable Method for Assessing Seed Germination, Dormancy, and Mortality under Field Conditions
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Cited by 5 •
2016
Here we present a protocol for assessing seed survivorship, germination and dormancy under field conditions using buried, labeled seed strips and tetrazolium chloride (TZ) viability testing.
03:56
Mosquito Feeding Assay: A Method to Evaluate Test Compound Effects on Mortality and Fecundity of Adult Female Mosquitoes
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2025
This video demonstrates a blood-feeding assay to evaluate the mortality and fecundity of test compounds with novel modes of action on female mosquitoes. This technique helps in screening new classes of insecticides to kill the resistant population of mosquitoes and control disease spread.
14:34
Biocontained Carcass Composting for Control of Infectious Disease Outbreak in Livestock
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Cited by 10 •
2010
Using readily available materials, this biocontained composting system enables effective on-site disposal of large animal carcasses arising in the event of infectious disease outbreak. This procedure kills most infectious agents in carcasses and contaminated manure. Once infectious agent is confirmed non-viable, mature compost can be spread as fertilizer.
FAQs
Pathogens may evade innate and adaptive immune defenses, allowing infection to persist or spread before the animal controls it. The resulting disease can also produce excessive inflammation or direct organ damage, either of which may become fatal. Examining mortality alongside clinical signs and diagnostic findings helps distinguish these mechanisms and identify infection patterns within a herd or flock.
An immune response can become harmful when inflammation is excessive rather than protective. In infection research, this possibility is considered alongside pathogen evasion and organ damage because each mechanism can produce different disease outcomes. Comparing clinical signs with postmortem findings helps investigators assess whether inflammatory injury or another infection-related process may be associated with deaths.
Age, nutrition, genetics, and environmental stress can shape how animals respond to infection and influence mortality outcomes. These factors may affect the ability to withstand disease or recover from immune and organ injury. Recording them with mortality data allows researchers and animal-health teams to interpret differences between groups more accurately instead of attributing every death to the pathogen alone.
Mortality patterns provide population-level evidence about the severity and distribution of disease. When combined with clinical signs, diagnostic testing, and postmortem findings, they can help identify infectious causes and possible transmission risks. This integrated view connects individual disease processes with herd or flock outcomes, supporting decisions about vaccination, biosecurity, surveillance, and treatment strategies.
A useful investigation combines the timing and pattern of deaths with observed clinical signs, diagnostic test results, and postmortem findings. Researchers can then compare these observations with relevant differences in age, nutrition, genetics, and environmental stress. This procedure helps identify likely infectious causes, evaluate transmission risks, and separate disease-associated patterns from variation linked to animal or environmental factors.
Mortality findings are most useful for prevention when interpreted with evidence about infectious causes and transmission risks. Repeated patterns supported by clinical, diagnostic, and postmortem information can indicate where vaccination, biosecurity, or surveillance should be strengthened. These measures aim to reduce losses while improving herd and flock health, rather than treating mortality as an isolated outcome.