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Strangles Management

Strangles: the latest research on the disease and what you need to know *H&H VIP*

Diagnosis is confirmed by bacterial culture of exudate from abscesses or nasal swab samples. CBC reveals neutrophilic leukocytosis and hyperfibrinogenemia. Serum biochemical analysis is typically unremarkable. The mainstay of treatment for Strangles is supportive care.

Survival of the organism in the environment depends on temperature and humidity; it is susceptible to desiccation, extreme heat, and exposure to sunlight and must be protected within mucoid secretions to survive. Under ideal environmental circumstances, the organism can survive ~4 wk outside the host.

Spread can be limited by the early detection of shedders amongst newly-affected (and in-contact) horses by taking three nasopharyngeal swabs over a two-week period and culturing the swabs for S. Three negative swabs provide strong evidence of freedom from infection in most cases. Transmission occurs through both oral and nasal routes. It can occur via direct contact between individual horses and/or through indirect contact.

The clinical attack rate of strangles is reduced by 50% in horses vaccinated with IM products that do not induce mucosal immunity. Local (mucosal) production of antibody requires mucosal antigen stimulation. An intranasal vaccine containing a live attenuated strain of S equi equi was designed to elicit a mucosal immunologic response.

What disinfectant kills strangles?

There are three methods to confirm the diagnosis of strangles: Culture of the bacteria from the nasal discharge or abscess. Polymerase chain reaction (PCR) that detects DNA of the S.

How to keep infections at bay in the yard *H&H VIP*

EQUI description

Any horse that develops signs consistent with strangles should be isolated immediately and examined by a veterinarian to exclude the possibility of strangles. Early treatment with antibiotics may be given in some cases, however they are not routinely required for treatment unless clinical signs warrant their use. Antibiotics are not always indicated as they cannot penetrate the centre of an abscess where there is no blood supply.

EQUI description

zooepidemicus isolates from horses. The isolates were analyzed by using pulsed-field gel electrophoresis, multilocus sequence typing, and sequencing of the szP gene. Molecular typing methods showed that human and equine isolates were identical or closely related.

EQUI description

Can a horse get strangles twice?

A common misconception is that the strangles bacteria can survive for a long time in the soil or on surfaces like walls or fencing. Once horses begin having bacteria in their secretions, they will continue to shed organisms for two to three weeks.

Horses recovering from the disease can still be infectious for many weeks. Untreated horses (not given antibiotics) will shed the bacteria on average for 2-6 weeks after infection.

•Horses with chondroids may require repeated lavages of the guttural pouches or physical removal of the chondroids. Those without chondroids may be treated with infusion of a penicillin gel into the guttural pouch and should re-test as negative prior to being allowed to re-join the clean group. •Ensure all horses are free of infection at the end of an outbreak. All recovered cases and in-contacts should be subjected to three consecutive nasopharyngeal swabs (culture) or guttural pouch lavages (culture/PCR) at weekly intervals.

However, most horses stop shedding within about three weeks. Antimicrobial therapy is controversial. Initiation of antibiotic therapy after abscess formation may provide temporary clinical improvement in fever and depression, but it ultimately prolongs the course of disease by delaying maturation of abscesses. Antibiotic therapy is indicated in cases with dyspnea, dysphagia, prolonged high fever, and severe lethargy/anorexia.

EQUI description

Is strangles contagious to other animals?

Streptococci Other than Groups A and B. Group C streptococci have been associated with puerperal sepsis, but neonatal sepsis or meningitis related to these organism is rare. Group G streptococci are an infrequent cause of neonatal sepsis and pneumonia.

EQUI description

Severely affected horses or those with complications may be candidates for antibiotics and other treatment at the discretion of the attending vet. Since Strangles is a bacterial disease, it might seem obvious to reach for antibiotics as the first line of treatment. However, the use of antibiotics in this particular infection is controversial, because they may be unnecessary in mild to moderate cases with no complications and potentially even lead to problems. A collection of experts in the field of infectious diseases of the horse has recently updated the veterinary recommendations for diagnosing Strangles. Hopefully, recent technological advances in the diagnostic testing of S.

EQUI description

Determination of the mimic epitope of the M-like protein adhesin in swine Streptococcus equi subsp. Dr Pelkonen is the head of Veterinary Bacteriology Research Unit, Research and Laboratory Department, Finnish Food Safety Authority, Finland.

The confirming diagnosis via culture can be obtained from a draining abscess, a nasal swab, a pharyngeal wash or a guttural pouch wash. Strangles infection with guttural pouch empyema. Endoscopic image of the entrance to the guttural pouch with obvious mucopurulent discharge.

  • Vaccination can help prevent or reduce the number of horses that become ill and can reduce the severity of clinical signs in horses that do become ill.
  • Fevers usually occur 3–14 days after exposure.
  • S equi is the most common cause of brain abscess in horses, albeit rare.
  • It is a highly contagious infection of the upper respiratory tract caused by the bacteria Strep.
  • Real-time PCR for detection and differentiation of Streptococcus equi subsp.
EQUI description

The lanes are marked with the number of the respective isolate. DNA of Salmonella enterica serovar Braenderup H9182 was used as a molecular marker. A 49-year-old man, a horse trainer from eastern Finland, was admitted to the hospital in August 2011 because of severe, prolonged low-back pain.

EQUI description

Bone Marrow, Blood Cells, and the Lymphoid/Lymphatic System1

The rectal temperature of all horses exposed to strangles should be obtained twice daily, and horses developing fever should be isolated (and potentially treated with penicillin). Contaminated equipment should be cleaned with detergent and disinfected using chlorhexidine gluconate or glutaraldehyde. Flies can transmit infection mechanically; therefore, efforts should be made to control the fly population during an outbreak. Farriers, trainers, and veterinarians should wear protective clothing or change clothes before traveling to the next equine facility. Additions to the herd should be carefully scrutinized for evidence of disease or shedding (nasopharyngeal culture) and quarantined for 14–21 days.

Hot, painful abscesses may develop on the sides of the head and throat, which may burst and discharge pus. The horse may experience difficulty eating or extending his head, due to the discomfort in its throat, hence the name strangles. Some 'recovered' horses (carriers) can harbour S.

Unfortunately there is considerable and unjustifiable stigma associated with the condition, with rumours of outbreaks spreading like wildfire. Yards that have an outbreak are recommended to share the news openly with the local equestrian community, rather than trying to keep it under wraps, in order to prevent wider infection. Around one in 10 former sufferers appear outwardly healthy, while carrying bacteria. These ‘carriers’ can intermittently shed bacteria for months — or even years — afterwards, meaning they pose an on-going risk to other horses. This disease causes major economic losses to the equine industry worldwide due to its prolonged course, extended recovery period and associated serious complications.

Strangles is a contagious bacterial infection in horses caused by the bacteria Streptococcus equi subspeciesequi. Besides the frustration experienced in dealing with horses affected by acute disease, strangles is not without its set of complications that arise subsequent to infection. About 20% of horses infected with strangles develop problems other than the basic upper respiratory signs.

What can you give a horse for a cough?

Strangles. Strangles is a highly contagious disease that affects a horses lymph nodes in its upper respiratory tract. It is caused by a bacterium called streptococcus equi. While direct contact between horses is the most common way that strangles is spread, it can also be spread by contaminated equipment.

zooepidemicus transmitted from horses can lead to severe infections in humans. As leisure and professional equine sports continue to grow, this infection should be recognized as an emerging zoonosis.

Clinical signs can last for days to months. Abscesses usually rupture and drain within two weeks. When abscesses burst, thick yellow pus is discharged, and recovery is generally without incident. This document provides practical information on how to manage and control strangles in horses. Outbreaks of strangles are reportable in Los Angeles County.Click here to download the form for reporting strangles in horses.

EQUI description

Generally, quarantine should last a minimum of three weeks past the resolution of the last case/clinical signs and all cases being declared S. The new “gold standard” for when a horse is considered S. equi negative is one guttural pouch wash submitted for PCR testing that does not find the bacteria.

EQUI description

Collection and Microbiological Characterization of Equine Isolates

Bastard strangles with marked weight loss. Differential diagnosis for weight loss is extensive but a previous history of S. equi infection allows inclusion of internal abscessation in the differentials. Hemopurulent discharge from guttural pouch (arrow) following recent rupture of lymph nodes into the pouch.

How do Horses get Strangles?

What are the strangles?

It is known that following vaccination, immunity will take a minimum of two to four weeks and the highest titers are usually obtained by eight weeks. Thus during an outbreak, if a horse is vaccinated and is then exposed to the infected horses before he has developed adequate immunity, he may contract strangles.”

Even though strangles is not a reportable disease in a legal sense, horse owners owe it to one another to be honest about a disease outbreak. There is some concern that an attenuated live S. equi organism could pass from vaccinated individuals to those that have not been vaccinated. Safety studies indicate that slight shedding occurs only during the first day. However, it is recommended that the intranasal strangles vaccine be administered with care after immunizing a horse with other intramuscular products during routine inoculations.

EQUI description

Affected animals may initially have a serous nasal discharge which progresses to mucopurulent and then purulent. The classical form of strangles presents with gross lymphadenopathy and abscessation of the pharyngeal, submaxillary and submandibular lymph nodes. This may be sufficient to result in serious and often life-threatening pharyngeal respiratory obstruction (hence the name ‘strangles’).

EQUI description

In some instances there is a bacteraemia which may be associated with spread of S. equi to satellite lymphoid tissue.