No effect of PRRSV on herd prevalence of Salmonella enterica

Researchers have demonstrated interactions between Porcine Reproductive and Respiratory Syndrome virus (PRRSV) and respiratory infectious agents such as swine influenza virus (1), porcine respiratory corona virus (1), Mycoplasma hyopneumoniae (2), Streptococcus suis (3,4), and Salmonella cholerasuis (5). In Denmark, field observations of increased within-herd seroprevalence of Salmonella enterica have been made concurrently with recent infection of PRRSV. We were interested in investigating whether these observations were random findings or whether recent infection with PRRSV alter the within-herd seroprevalence of Salmonella enterica

The influence of change in feeding and management on the prevalence of multi-resistant Salmonella typhimurium DTI 04 in Danish pigherds. Four case stories

In the period June-December 1998 attempt were made to reduce the apparent prevalence of multi-resistant Salmonella Typhimurium DTI04 in four infected herds. The interventions were intensive rodent control, thorough cleaning, inclusion of organic acid in feed/water, and feeding non heat treated feed (to mimic home mixed feed). Every month 50-70 pooled faecal samples were collected from each herd. The four herds showed great variation in apparent prevalence between age groups in the same herd

Tracing back multi-resistant Salmonella typhimurium DTI04 from pork at the slaughterhouse to a specific swine herd by strategical use of serology and culture

Multi-resistant Salmonella typhimurium DTI04 (DT104) was first isolated from Danish livestock in 1996. DTI 04 is now known as an important and emerging pathogen in many countries. In Denmark, multi-resistant Salmonella typhimurium DT 104 is officially declared an unwanted bacteria in any food. Consequently, when DT 104 is detected in pork at a Danish slaugtherhouse, all carcasses from the day of slaugther in question must be heat treated. In order to find DT I 04 infected swine herds, a mandatory tracing back procedure is performed by strategical use of serology and culture

Assessing the risk of Salmonella transmission within primary pork production in Denmark

Since the Agreement on the Application of Sanitary and Phytosanitary Measures (\u27SPS Agreement\u27) under the governance of the World Trade Organisation (WTO), risk analysis has become the standard method for the scientific documentation of risks related to animal products and trade (I). Similar principles have also been adopted in food safety as described by the Codex Committee on Food Hygiene (2). The framework of risk analysis appears - therefore to be appropriate for the assessment of salmonella transmission and contamination in the Danish pork production chain

Eradication of multi-resistant Salmonella typhimurium DT104 infections in 15 Danish swine herds

Multi-resistant Salmonella typhimurium DTI 04 (=DTI 04) was first isolated in United Kingdom in the 1980s. DT104 was isolated in Denmark for the first time in 1996 (1). Retrospective analysis of isolates detected DTI 04 in a Danish swine herd in 1991. The majority of the Danish isolates are characterized by being resistant to 5 frequently used antibiotics; ampicillin, chloramphenicol, streptomycin, sulphonamides and tetracycline (ACStSuT), but isolates being resistant to e.g. flouroquinolones as well have been detected. DTI 04 is now known as an important and emerging pathogen in many countries (2, 3, 4, 5). DTI 04 has spread rapidly between animals within the herd, between herds and to other species (6). Salmonella \u27JYphimurium DTl 04 remains the second most common Salmonella in humans in England and Wales in 1997,95 pet. of the isolates were resistant to four or more antibiotics with the most common resistance pattern is that of ACStSuT (7). The described combination of the ability to spread rapidly and the multiresistance towards antibiotics used frequently in animals and humans implies that DTI 04 can be a serious problem for both animals and humans. By June 1999 DTI04has been detected in 16 swine herds, 12 combined swine and cattle herds and 2 cattle herds in Denmark. HumaneDTI04 cases have slightly increased in Denmark from 1997 to 1998. DTI04 now accounts for 13 pet. of Salmonella typhimurium phage types compared to 7 pet. in 1997. This increase is explained by the first community outbreak of DTI 04 in Denmark

No effect of PRRSV on herd prevalence of Salmonella enterica

Researchers have demonstrated interactions between Porcine Reproductive and Respiratory Syndrome virus (PRRSV) and respiratory infectious agents such as swine influenza virus (1), porcine respiratory corona virus (1), Mycoplasma hyopneumoniae (2), Streptococcus suis (3,4), and Salmonella cholerasuis (5). In Denmark, field observations of increased within-herd seroprevalence of Salmonella enterica have been made concurrently with recent infection of PRRSV. We were interested in investigating whether these observations were random findings or whether recent infection with PRRSV alter the within-herd seroprevalence of Salmonella enterica.</p

Tracing back multi-resistant Salmonella typhimurium DTI04 from pork at the slaughterhouse to a specific swine herd by strategical use of serology and culture

Multi-resistant Salmonella typhimurium DTI04 (DT104) was first isolated from Danish livestock in 1996. DTI 04 is now known as an important and emerging pathogen in many countries. In Denmark, multi-resistant Salmonella typhimurium DT 104 is officially declared an unwanted bacteria in any food. Consequently, when DT 104 is detected in pork at a Danish slaugtherhouse, all carcasses from the day of slaugther in question must be heat treated. In order to find DT I 04 infected swine herds, a mandatory tracing back procedure is performed by strategical use of serology and culture.</p

The influence of change in feeding and management on the prevalence of multi-resistant Salmonella typhimurium DTI 04 in Danish pigherds. Four case stories

In the period June-December 1998 attempt were made to reduce the apparent prevalence of multi-resistant Salmonella Typhimurium DTI04 in four infected herds. The interventions were intensive rodent control, thorough cleaning, inclusion of organic acid in feed/water, and feeding non heat treated feed (to mimic home mixed feed). Every month 50-70 pooled faecal samples were collected from each herd. The four herds showed great variation in apparent prevalence between age groups in the same herd.</p

Assessing the risk of Salmonella transmission within primary pork production in Denmark

Since the Agreement on the Application of Sanitary and Phytosanitary Measures ('SPS Agreement') under the governance of the World Trade Organisation (WTO), risk analysis has become the standard method for the scientific documentation of risks related to animal products and trade (I). Similar principles have also been adopted in food safety as described by the Codex Committee on Food Hygiene (2). The framework of risk analysis appears - therefore to be appropriate for the assessment of salmonella transmission and contamination in the Danish pork production chain.</p