Related Experiment Video
Updated: Jul 21, 2026

13:42
Clinical Examination Protocol to Detect Atypical and Classical Scrapie in Sheep
Published on: January 19, 2014
Epidemiology of sheep pox
Tropical Animal Health and Production
|November 1, 1982
Summary
Sheep pox outbreaks significantly impacted a flock of indigenous and European crossbred sheep over 18 weeks. Lambs and hoggets showed the highest morbidity, while crossbred hoggets experienced the greatest mortality.
Area of Science:
- Veterinary Medicine
- Animal Virology
- Epidemiology
Background:
- Sheep pox is a contagious viral disease affecting sheep globally.
- Indigenous and exotic sheep breeds may exhibit varying susceptibility to diseases.
- Understanding disease dynamics in mixed flocks is crucial for effective control.
Purpose of the Study:
- To document the epidemiological characteristics of a sheep pox outbreak.
- To identify susceptible age groups and breed types within the affected flock.
- To determine the impact of sheep pox on morbidity and mortality rates.
Main Methods:
- Retrospective analysis of an 18-week sheep pox outbreak.
- Monitoring of incidence, morbidity, and mortality in a flock of 2,191 sheep.
- Categorization of affected animals by breed (purebred indigenous, crossbred) and age (lambs, hoggets).
Main Results:
- The outbreak lasted 18 weeks, with peak incidence and mortality at 5 weeks.
- Purebred and crossbred lambs and crossbred hoggets exhibited the highest morbidity.
- Crossbred hoggets recorded the highest mortality and case fatality rates.
Conclusions:
- Sheep pox can cause significant morbidity and mortality in susceptible sheep populations.
- Crossbred hoggets appear to be particularly vulnerable to severe outcomes.
- Effective disease management strategies are essential to mitigate economic losses in sheep farming.
Related Concept Videos
Infectious Diseases and Their Occurrence
Infectious diseases appear in populations through various transmission patterns, influenced by pathogen characteristics, population immunity, environmental conditions, and social behavior. Understanding these patterns is essential for effective public health surveillance and intervention. These categories—sporadic, outbreak, epidemic, pandemic, and endemic—help frame the nature and scope of disease events.Sporadic diseases occur irregularly and infrequently, without a predictable temporal or...
Plague
Plague is a highly virulent zoonotic disease caused by Yersinia pestis, a Gram-negative, facultatively anaerobic coccobacillus. This pathogen primarily circulates among rodent populations and is transmitted to humans through the bite of infected fleas. Additional transmission routes include direct contact with infected animal tissue or inhalation of respiratory droplets from individuals with pneumonic plague. These multiple transmission pathways highlight the bacterium’s potential for rapid...
Smallpox
Smallpox is a severe contagious disease caused by the Variola major virus, a double-stranded DNA member of the Poxviridae family.Variola major transmission occurs primarily via inhalation of virus-laden droplets or direct contact with infectious scabs. The incubation period averages approximately seven days, although it may range from 7 to 17 days depending on the inoculum and host factors.Clinically, the prodromal phase is marked by an abrupt onset of high fever, malaise, headache, and myalgia.
Chickenpox
Chickenpox is an acute, highly contagious disease caused by the varicella-zoster virus (VZV), a double-stranded DNA virus belonging to the Herpesviridae family. Its transmission occurs primarily through the inhalation of respiratory droplets or direct contact with vesicular fluid from skin lesions. The incubation period typically ranges from 10 to 21 days, during which the virus replicates and disseminates through sequential phases within the host. Although generally self-limiting in children,...
Poliomyelitis
Poliomyelitis is caused by poliovirus, a small, non-enveloped, positive-sense RNA virus of the Picornaviridae family and Enterovirus genus. Transmission occurs primarily via the fecal-oral route, often through ingestion of contaminated water or food. The virus initially replicates in the oropharynx and intestinal mucosa, particularly in lymphoid tissues such as the tonsils, Peyer’s patches, and regional lymph nodes. Primary viremia follows, allowing dissemination throughout the body.In most...
Toxoplasmosis
Toxoplasmosis, a zoonotic disease caused by the protozoan Toxoplasma gondii, poses significant public health challenges globally due to its high seroprevalence and varied clinical manifestations. As an obligate intracellular parasite, T. gondii can infect all warm-blooded vertebrates, but felids are its only definitive hosts, shedding unsporulated oocysts into the environment. Humans typically acquire the infection through ingestion of tissue cysts in undercooked meat or oocysts from...

