Contagious redirects here. For the Isley Brothers song of that name, see Contagious (song).
A disease is an abnormal condition of the body or mind that causes discomfort, dysfunction, or distress to the person afflicted or those in contact with the person. Sometimes the term is used broadly to include injuries, disabilities, syndromes, infections, symptoms, deviant behaviors, and atypical variations of structure and function, while in other contexts these may be considered distinguishable categories.
Pathology is the study of diseases. The subject of systematic classification of diseases is referred to as nosology. The broader body of knowledge about human diseases and their treatments is medicine. Many similar (and a few of the same) conditions or processes can affect animals (wild or domestic). The study of diseases affecting animals is veterinary medicine. Plants as well can suffer from a variety of processes such as infection, nutrient deficiency, or deleterious mutation. The study of diseases affecting plants is termed plant pathology.
More on [ Disease ]
Sheep :: Livestock
Sheep Health
Livestock :: Conditions and Diseases

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Abortion in Sheep - Advice from the Veterinary Investigation Centre, Langford.
Avoid Foot Rot Like the Plague - Prevention of footrot is the only practical way of dealing with this problem.
Meta Description: [ An article outlining the basics of avoiding footrot. ]
Club Lamb Fungus Disease - Club lamb fungus disease is a threat to both animals and humans. This guide reports on the disease cause, symptoms and treatment methods.
Meta Description: [ The University of Nebraska-Lincoln, founded in 1869, is one if the nation's premier land-grant institutions. UNL is a member of the Association of American Universities and is classified by the Carnegie Foundation for the Advancement of Teaching as a Doctoral/Research University-Extensive. ]
Coccidia - Causes, symptoms, and treatment.
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Contagious Foot Rot of Sheep - Foot rot is a serious, contagious disease of sheep in which the horny hoof tissue is involved and undermined. Once established, it usually remains in a flock unless a systematic treatment program is used to eradicate it.
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Contagious Foot Rot of Sheep - An Update - Foot rot is a serious contagious disease of sheep that has become a common problem in the western states in recent years. Once established in a flock, it usually remains until a consistent treatment program eliminates it. This disease must be differentiated from other foot problems if it is to be successfully treated.
Control of Foot Rot in Sheep - Footrot and dogs have driven more people out of the sheep business than any other reason. There is probably much truth to statements like this. Footrot is a serious problem in Indiana and surrounding states that has had a strong negative impact on our sheep industry.
Meta Description: [ Controlling footrot in your sheep flock and methods of prevention and treatment. ]
Control of Internal Parasites in Sheep - Things to keep in mind when developing an effective parasite control program. (Virginia)
Controlling Internal Parasites in Sheep - To effectively control internal parasites at a reasonable cost, one needs to understand the interaction between the worms and sheep, have knowledge of the parasite life cycle and use dewormers and other management practices wisely.
Meta Description: [ Methods of controlling internal parasites in your sheep flock. ]
Enterotoxemia in Lambs - Causes, prevention and treatment of overeating or pulpy kidney disease.
Meta Description: [ The University of Nebraska-Lincoln, founded in 1869, is one if the nation's premier land-grant institutions. UNL is a member of the Association of American Universities and is classified by the Carnegie Foundation for the Advancement of Teaching as a Doctoral/Research University-Extensive. ]
Epididymitis - How to recognize and manage this chronic infection of the epididymis and testes associated with lowered ram fertility.
Meta Description: [ The OMAFRA website has moved. ]
Fighting and Winning the Parasite Battle in Sheep - Worms: sheep get them, shepherds try to kill them. For a control and prevention program, some knowledge of type of parasites, life cycle of parasite, sheep susceptibility, anthelmintics (dewormers) available, management options available, local and regional considerations, and whole farm prevention programs are necessary to win the battle.
Meta Description: [ An article outlining the basics of fighting parasites. ]
Foot and Mouth Disease - Information on the disease from the UK Department for Environment, Food and Rural Affairs.
Foot Rot - Steps to control, treat, and eliminate.
Footrot Control (1990) - Causes, prevention and treatment of this common cause of lameness in sheep.
Footrot in Sheep: Benign Footrot - Benign footrot, also known as scald or non progressive footrot, is a common condition of Victorian sheep flocks. Benign strains have similar survival and transmission features to those of virulent strains of the same organism.
Meta Description: [ Information Note about Footrot in Sheep, Benign Footrot. ]
Footrot in Sheep: Diagnosis - This Agriculture Note gives information on how to diagnose footrot
Meta Description: [ Information Note about Footrot in Sheep, Diagnosis. ]
Footrot in Sheep: Disease Facts - Ovine (sheep) footrot is a serious disease which has long been dreaded by sheep owners. It is a disease which causes severe economic loss, suffering due to lameness and disruption to normal farm operations. The economic losses result from reduced body weight and growth, decreased wool production and restrictions to marketing opportunities.
Meta Description: [ Information Note is about Footrot in Sheep and contains facts about the disease. ]
Footrot in Sheep: Prevention and Damage Control - Footrot! How can I keep it out? What can I do if my flock gets it? A vendor declaration form is also included.
Meta Description: [ Information Note about Footrot in Sheep, Prevention and Damage Control. ]
Footrot in Sheep: Treatment - This Agriculture Note discusses treatment options.
Meta Description: [ Information Note number 3 in series about footrot in sheep ]
Gestational Psittacosis in a Montana Sheep Rancher - This site contains an article about a woman that was exposed to Chlamydia psittaci from sheep while pregnant.
Handling Internal Worm Parasitism in Sheep - Acquaints the reader with methods of preventing, controlling, and treating parasitism in sheep.
Meta Description: [ The University of Nebraska-Lincoln, founded in 1869, is one if the nation's premier land-grant institutions. UNL is a member of the Association of American Universities and is classified by the Carnegie Foundation for the Advancement of Teaching as a Doctoral/Research University-Extensive. ]
Internal Parasites - Life cycles, drench resistance, lab tests and other information.
Johne's Disease in Sheep - Good discussion regarding Johne's disease (pronounced yonee's), a bacterial disease of ruminants characterized by wasting and diarrhea.
Meta Description: [ The OMAFRA website has moved. ]
Mastitis - Description of the mammary gland system, causes of mastitis and methods to treat and prevent inflammation of the mammary gland or udder of the ewe.
OPP and Sheep Health Facts - Fact sheets describe the disease and methods of eradication. Also includes membership information for the OPP Concerned Sheep Breeders Society and a veternarian referral list.
Meta Description: [ Groveland Farm presents Ovine Progressive Pneumonia (OPP) and Sheep Health facts. ]
Ovine Brucellosis - Ovine brucellosis (OB) is a bacterial disease of sheep found throughout Australia and characterised by infertility in rams. Learn how to diagnose and control this serious problem.
Meta Description: [ Department of Primary Industries, Victoria, Australia. ]
Ovine Progressive Pneumonia in Sheep - Provides information on ovine progressive pneumonia, a common disease in sheep. Covers prevalence, transmission, clinical signs, diagnosis, and control and eradication of the disease. Includes color photos showing infected lungs and microscopic cross-sections of lungs. For sheep
Meta Description: [ Provides information on ovine progressive pneumonia, a common disease in sheep. Covers prevalence, transmission, clinical signs, diagnosis, and control and eradication of the disease. Includes color photos showing infected lungs and microscopic cross-sections of lungs. For sheep ]
Pizzle Rot - Symptoms, progression and treatment of this potentially serious problem affecting rams.
Meta Description: [ The OMAFRA website has moved. ]
Pneumonia - Factors to consider when outbreaks of pneumonia occur.
Meta Description: [ The OMAFRA website has moved. ]
Pregnancy Toxemia - Symptoms, treatment and prevention.
Preventing Pasture Bloat in Sheep - Bloat can be a sudden and lethal occurrence for sheep. Often, unless the livestock is being monitored closely, the first symptom one notices is dead or distressed animals.
Meta Description: [ An article outlining prevention of pasture bloat. ]
Ringworm and Club Lamb Fungus - Tips to limit the spread of this ringworm type disease which is caused by a fungus.
Meta Description: [ The University of Nebraska-Lincoln, founded in 1869, is one if the nation's premier land-grant institutions. UNL is a member of the Association of American Universities and is classified by the Carnegie Foundation for the Advancement of Teaching as a Doctoral/Research University-Extensive. ]
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Scrapie - Voluntary Flock Certification Program, FAQ and links.
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Sheep Dipping - Extensive information from the UK Health Safety Executive on sheep dipping; including hazards and safety, proper treatment, controls.
Meta Description: [ 404 error ]
Topical Footrot Treatment - Instructions for treating with solution of oxytetracycline in alcohol.
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Udder Diseases of Sheep - There are two major udder disease problems of ewes, hardbag and bluebag. They both tend to occur sporadically and are frustrating for producers to treat or prevent.
Urinary Calculi in Growing Lambs - Factors predisposing young rams to urinary crystals and blockage of the urethra.
Meta Description: [ The OMAFRA website has moved. ]
USDA APHIS VS Scrapie Information - Links to information about the disease, certification program and proposed rules.
Meta Description: [ Scrapie Program ]
Using Aggressive Flock Management to Avoid Foot Problems - The author details the steps she has taken to avoid the introduction of the bacterium Dichelobacter Nodosus onto her ranch.
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