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286534 occurrences (No.87 in the rank) during 5 years in the PubMed. [no cache] 500 found

327) In experimentally infected pigs, survival of PRRS virus in muscle held at 4°C has been demonstrated for at least 7 days, and infectivity of the virus in these samples was confirmed by bioassay.

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PMID:24016101 DOI:10.1111/tbed.12163

2015 Transboundary and emerging diseases

* Fresh Pork and Porcine Reproductive and Respiratory Syndrome Virus: Factors Related to the Risk of Disease Transmission.

- Porcine reproductive and respiratory syndrome virus (PRRS) is a highly infectious virus. Experimentally, the disease can be induced in naïve pigs by the oral, intranasal and intramuscular routes. Depending on the virulence of the strain of the virus and the age of the pig, peak viremia can occur within 7 days of infection, and live virus can be isolated from blood or lymph nodes for several months post-infection. Young pigs tend to develop higher titres of viremia than older pigs infected by the same route and dose with the same strain of virus. Porcine reproductive and respiratory syndrome virus survives in pork harvested from infected pigs for extended periods at temperatures of -20 or -70°C. In experimentally infected pigs, survival of PRRS virus in muscle held at 4°C has been demonstrated for at least 7 days, and infectivity of the virus in these samples was confirmed by bioassay. The optimal pH range for the survival of PRRS virus is thought to be 6.0 to 7.5. The elevated pH of non-meat tissues (generally one pH unit higher) is likely to favour extended survival of PRRS virus in pig carcasses from which all superficial and deep lymph nodes have not been removed. It is likely that exsanguinated carcasses held at 4°C retain sufficient blood or lymph tissue to contain infective doses of PRRS virus. Porcine reproductive and respiratory syndrome virus is rapidly inactivated by heat, providing a predictable method to ensure that pork tissues are free of viable virus and feeding of cooked swill or garbage should not constitute a risk to pigs. While the probability of viable PRRS virus being present in a pig carcass may be low, the risk is not zero. The importation of raw pork into countries where PRRS is not endemic represents a hazard with potentially severe economic consequences.

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(1)158 that	(10)5 good	(19)3 excellent	(28)2 efficacy
(2)48 the	(11)5 increased	(20)3 more	(29)2 greater
(3)40 a	(12)5 significantly	(21)3 no	(30)2 how
(4)23 by	(13)4 as	(22)3 that,	(31)2 successful
(5)21 to	(14)4 better	(23)2 acceptable	(32)2 through
(6)13 in	(15)4 improved	(24)2 and	(33)2 using
(7)12 null	(16)4 its	(25)2 both
(8)11 an	(17)4 similar	(26)2 decreased
(9)8 for	(18)3 between	(27)2 differential

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--- WordNet output for demonstrated --- Overview of verb demonstrate The verb demonstrate has 4 senses (first 4 from tagged texts) 1. (24) show, demo, exhibit, present, demonstrate -- (give an exhibition of to an interested audience; "She shows her dogs frequently"; "We will demo the new software in Washington") 2. (22) prove, demonstrate, establish, show, shew -- (establish the validity of something, as by an example, explanation or experiment; "The experiment demonstrated the instability of the compound"; "The mathematician showed the validity of the conjecture") 3. (2) attest, certify, manifest, demonstrate, evidence -- (provide evidence for; stand as proof of; show by one's behavior, attitude, or external attributes; "His high fever attested to his illness"; "The buildings in Rome manifest a high level of architectural sophistication"; "This decision demonstrates his sense of fairness") 4. (1) demonstrate, march -- (march in protest; take part in a demonstration; "Thousands demonstrated against globalization during the meeting of the most powerful economic nations in Seattle") Overview of adj demonstrated The adj demonstrated has 1 sense (first 1 from tagged texts) 1. (1) demonstrated -- (having been demonstrated or verified beyond doubt) --- WordNet end ---