PMID: 8593302Oct 1, 1995Paper

A serological study on infection patterns, control and persistence of classical swine fever in infected farms in the Philippines

The Journal of Veterinary Medical Science
P GeertsR Sanchez

Abstract

In 3 farrow-to-finish farms with enzootic classical swine fever (CSF) all sick pigs were culled and an intensive vaccination program was introduced. Boars and cows were vaccinated every 6 months and piglets at the age of 6 and 8 weeks. The infection was monitored on clinical grounds and by means of serological examination of the farms. Serological results reflected well the clinical situation in the farms. High titers and high percentage of animals with positive titers were observed in infected farms, compared to lower titers in a clinically "free" farm, which were interpreted as titers due to vaccination. Although clinical improvement was noticed, the rigid vaccination regime was not able to control CSF in none of the farms. In all cases, a small percentage of pigs in the finishing stage was still affected. Since these pigs seemed not to have responded to vaccination at 6 and 8 weeks of age, the programme was questioned. Additionally, very high titers were recorded in sows from infected farms, which would automatically extend the period of passive protection in offspring and postpone the age at which piglets could be vaccinated. More intensive programmes, which include also vaccination beyond the age of 8 weeks, were suggested...Continue Reading

Citations


❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.