Epidemiological Studies on the Occurrence of <i>Listeria monocytogenes</i> in the Feces of Dairy Cattle

Husu, J. R.

doi:10.1111/j.1439-0450.1990.tb01059.x

Cited by 78 publications

(79 citation statements)

References 16 publications

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“…Consecutive isolation of L. monocytogenes from two farms Table 4. Relationship between isolation of L. monocytogenes from silage samples and their pH domestic species, the organisms are often found in the intestines of healthy cows as well as in the environment (1,7,8,16,17). This study also confirmed the presence of L. monocytogenes in areas where there had been no reports of listeriosis.…”

Section: Incidence Of L Monocytogenes In Silage In Relation To Phsupporting

confidence: 76%

The Prevalence of Listeria monocytogenes in the Environment of Dairy Farms

Ueno

Yokota

Arai

et al. 1996

Microbiology and Immunology

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The prevalence of Listeria monocytogenes in the environment of dairy farms was surveyed from December 1993 to June 1994 in one city of Hokkaido. L. monocytogenes was isolated from 3 out of 5 farms investigated. Serovar 4b organism was isolated from the brain stem of a cow from one farmwhich was clinically diagnosed as having listeriosis. The same serovar of L. monocytogenes was also isolated from the rectal contents of a healthy cow, straw on the floor, straw in the barn, and silage scattered around the silo from the same farm. At another farm, with no reported cases of bovine listeriosis, serovar 1/2 organism was isolated from the same types of samples as the above mentioned farm except from straw on the floor. The difference in the isolation rates of the organism from straw on the floor between the two farms (22 % : 5/23 vs 0% : 0/24) is considered to be caused by the different feeding methods of silage between the two farms.

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Section: Incidence Of L Monocytogenes In Silage In Relation To Phsupporting

confidence: 76%

The Prevalence of Listeria monocytogenes in the Environment of Dairy Farms

Ueno

Yokota

Arai

et al. 1996

Microbiology and Immunology

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“…Differences in sampling and analytical methods can also give rise to variability in L. monocytogenes prevalence. Overall prevalence below 10% is commonly reported when individual animals are sampled from several (Husu, 1990) or only one herd (Vilar et al, 2007). However, prevalence values above 20% for faecal shedding of L. monocytogenes have been reported in healthy cattle from several herds (Nightingale et al, 2004;Esteban et al, 2009).…”

Section: Healthy Animalsmentioning

confidence: 99%

Review. Dairy farm management and production practices associated with the presence of Listeria monocytogenes in raw milk and beef

Santorum

Garcia

López-Alonso

et al. 2012

Span. j. agric. res.

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Human listeriosis is a severe foodborne disease caused by Listeria monocytogenes. It is a zoonosis that represents a significant concern for the food industry due to the high mortality rate it causes and the fact that the organism is capable of growing at refrigeration temperatures. Dairy products and ready-to-eat meats are among the foods most often involved in listeriosis outbreaks. Listeria is a common contaminant in the dairy environment, both on the farm and in the processing plant. The main sources of L. monocytogenes in dairy farms are manure and improperly fermented silage. If silage crops are grown on contaminated land, a new cycle of silage contamination and faecal shedding by ruminants that consume such silage may ensue. High loads of L. monocytogenes produced in farm environments may thus represent a primary source for the introduction of this pathogen into the human food supply chain; dairy cows would represent a reservoir for the bacterium, and raw milk and beef would represent the main vehicles for its transmission from dairy farms to humans. Even if contamination originates in post-processing environments, contaminated raw foods may still represent a vehicle for introducing L. monocytogenes into food processing plants. Molecular typing methods have confirmed that common strains of L. monocytogenes are present in dairy farm-associated isolates and isolates from both human epidemic and sporadic cases. Pre-harvest (on-farm) control of listeriosis should be based mainly on the control of manure, silage, herd health and milking practices.Additional key words: animal reservoir; dairy primary production; environmental sources; food vehicles; listeriosis. ResumenRevisión. Tipos de gestión y producción de las granjas de ganado vacuno lechero relacionados con la presencia de Listeria monocytogenes en la leche y la carne La listeriosis humana es una grave enfermedad transmitida por alimentos y causada por Listeria monocytogenes. Se trata de una zoonosis que supone una gran preocupación para la industria alimentaria debido a su alta tasa de mortalidad y al hecho de que el microorganismo es capaz de crecer a temperaturas de refrigeración. Listeria es un contaminante habitual en las granjas y plantas de productos lácteos. En las granjas las fuentes principales de L. monocytogenes son el estiércol y los ensilados mal fermentados. Si la cosecha utilizada para producir ensilados procede de campos contaminados, puede comenzar un nuevo ciclo de contaminación de los ensilados y liberación del patógeno en las heces de los animales. El ganado vacuno lechero representa uno de los principales reservorios de este microorganismo y la leche y la carne representarían los principales vehículos para su transmisión desde la granja de producción de leche al ser humano. Incluso cuando la contaminación del alimento procede de etapas posteriores al procesado, los alimentos crudos contaminados también representan uno de los vehículos de entrada de L. monocytogenes en las plan-

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“…were obtained from the sheep and cow's milks, bulk tank milks and silage samples examined. Similarly, a low prevalence (0-5%) of L. monocytogenes in bulk tank milk has been reported from countries such as India (1), Sweden (36), Canada (7), Spain (10), and Finland (15). In contrast, some authors reported a greater prevalence of Listeria spp.…”

Section: Discussionmentioning

confidence: 73%

“…Previous studies reported that Listeria spp. were found between 0.5% and 67% of the isolation rate in cattle and sheep feces (15,29,30,35,37). Our findings were also in this range.…”

Section: Discussionmentioning

confidence: 99%