Monday, 22 November 2010

Circocirus and MRSA - pig to pig spread

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This abstract says nothing really new for anyone using their common sense, but it needed saying.

It has been obvious for years that circovirus, and associated MRSA, travelled from pig to pig and to new herds by live introductions.

The real crime here is that Britain, and others, knowingly exported live pigs worldwide and imported live pigs from infected areas despite the obvious risks.

They also ecouraged domestic pyramid systems almost  as if to make quite sure that no herd escaped porcine circovirus.

Government then covered up what they had done by illegal methods including blatent organised intimidation of whistle-blowers and any farmer complaining.

This was veterinarians, supposed to be combating disease, causing and spreading disease through greed and recklessly signed health certificates.

Even if circovirus is completely harmless to humans, something uncertain, this impacts on the human population by the excessive antibiotic use to deal with other illnesses in circovirus weakened pig herds.

Excessive antibiotic use creates, sustains and spreads antibiotic resistant disease such as MRSA within pigs that evetually spread to humans.

Much as they would like to think otherwise, and are now anxious to suggest, it is ironic that the vets themselves and their families are most at risk.

They will be shunned: “ex-veterinarian” - the modern equivalent of the leper’s bell.

Still, who needs vets without the right to prescribe antibiotics; a right that will inevitably be curbed or removed?

The practice of veterinary medicine relies on them; without antibiotics, veterinarians are of little value to any animal or its owner.

Abstract
Anim Health Res Rev. 2010 Dec;11(2):217-234.


Epidemiology and horizontal transmission of porcine circovirus type 2 (PCV2).


Patterson AR, Opriessnig T.


Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, 1600 S. 16th Street, Ames, IA 50011, USA.


Abstract


Porcine circovirus type 2 (PCV2) is a small, non-enveloped, circular, single-stranded DNA virus of economic importance in the swine industry worldwide. Based on the sequence analyses of PCV2 strains, isolates can be divided into five subtypes (PCV2a-e). PCV2 is an ubiquitous virus based on serological and viremia data from countries worldwide. In addition, PCV2 DNA was discovered in archived samples prior to the first recognition of clinical disease. Recently, a worldwide shift in PCV2 subtype from PCV2a to PCV2b occurred. PCV2 DNA can be detected in fecal, nasal, oral and tonsillar swabs as well as in urine and feces from both naturally and experimentally infected pigs. PCV2 DNA can be detected early in the infectious process and persists for extended periods of time. The effectiveness of disinfectants for reducing PCV2 in vitro is variable and PCV2 is very stable in the pig environment. Limited data exist on the horizontal transmission of PCV2. Direct transmission of PCV2 between experimentally or naturally infected animals and naïve animals has been documented and the incorporation of clinical or subclinically infected animals into a population represents a risk to the herd. Indirect transmission through the oral, aerosol or vaccine routes is likely a lesser risk for the transmission of PCV2 in most swine populations but may be worth evaluating in high heath herds. The objective of this review was to discuss data on the epidemiology and horizontal transmission of PCV2.


PMID: 21087576 [PubMed - as supplied by publisher]