Effect of Infectious Status and Parity on Somatic Cell Count and California Mastitis Test in Pampinta Dairy Ewes

Suárez, Víctor Humberto; Busetti, M. R.; Miranda, Adelina; Calvinho, Luis Fernando; Bedotti, D. O.; Canavesio, V. R.

doi:10.1046/j.1439-0450.2002.00552.x

Cited by 28 publications

(24 citation statements)

References 8 publications

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“…Early bacteriological diagnoses from several farms as well as previous observations (Suárez et al 2002) showed that Staphylococcus aureus was involved in both clinical and subclinical cases of mastitis. Results show that mastitis is a serious health and production problem, not only due to deaths and loss of udders, but also because subclinical mastitis causes substantial losses in milk yield (Miranda et al 2001.…”

Section: Discussionmentioning

confidence: 88%

Health management practices and disease prevalence in dairy sheep systems in Argentina

Suárez

Busetti

2009

Pesq. Vet. Bras.

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931Pesq. Vet. Bras. 29(11):931-937, novembro 2009 RESUMO.-[Práticas de manejo sanitário e frequência de doenças em ovinos leiteiros na Argentina.] Foi realizado um levantamento longitudinal em 19 fazendas de ovinos leiteiros na Argentina com o objetivo de conhecer práticas de manejo, medidas sanitárias e ocorrência e freqüência das enfermidades. O levantamento incluiu 40% de todas as fazendas do país que produzem leite ovino. Um questionário foi utilizado com entrevistas pessoais com os ovinocultores durante visita às fazendas. A percentagem de fazendas que relataram vacinação rotineira contra clostridioses, ectima contagioso, pneumonia e administração parenteral de minerais e vitaminas foi 63%, 47,3%, 16,6% e 42,1%, respectivamente. Parte dos produtores (37,5%) realizava tratamento regularmente contra piolhos e 89,5% contra nematódeos gastrintestinais. O número médio de tratamentos anti-helmínticos anuais, por fazenda, era de 2,26+1,78. A cross-sectional survey of 19 dairy sheep farms in Argentina was carried out with the purpose to know farm management, health practices, and occurrence and mortality of diseases. The survey comprised 40% of all sheep milking farms in Argentina. A questionnaire was conducted by way of personal interviews with sheep owners during farm visits. The proportions of farms reporting routine vaccination for clostridial diseases, contagious ecthyma, pneumonia and mineral and vitamin parenteral administration were 63%, 47.3%, 16.6% and 42.1% respectively. Regular treatment against lice was used in 37.5% of the farms, and 89.5% o the farmers treated against gastrointestinal nematodes (GIN). The mean number of GIN drenches per farm was 2.26±1.78 annually. In 68.4% of the milking flocks the California Mastitis Test was regularly done and 55.6% of the farmer managers had sampled their flocks once a year for Brucella ovis antibodies. During the pre-mating period respectively 68.4% and 50% of farmers clinically examined their rams and ewe for general health and teeth condition. The udders of ewes were frequently inspected at the start of each milking period. The most important parasite problems noticed were GIN (reported by 57.9% of farmers), lice (57.9%) and scabies (10.5%) and the most frequent infectious diseases were ecthyma (73.7%), pneumonia and other respiratory problems (57.9%), clinical mastitis (55.6%), clostridial diseases (36.9%) and foot lameness (35.2%). Photosensitivity (47.4%) and ruminal acidosis (42.1%) were reported as other frequent toxic or metabolic disorders. Owners mentioned that the mean lifespan or milk productive time per ewe was 4.5±1.4 years. Perinatal lamb mortality was 8.5% and the total flock mortality rates, above the first 24 h of life was 6.9%. The high rates of lamb mortality during the pre-weaning (10.3%) and post-weaning (5.9%) periods indicate that this problem, as well as the most prevalent diseases, should be the subject of further studies. e 50% dos produtores examinavam clinicamente seus carneiros e a condição geral e de dentes de suas ovelhas. O úb...

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Section: Discussionmentioning

confidence: 88%

Health management practices and disease prevalence in dairy sheep systems in Argentina

Suárez

Busetti

2009

Pesq. Vet. Bras.

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“…Listeria monocytogenes and Salmonella spp. IMI are very rare but important; these organisms can cause chronic and subclinical IMI [2,8,14,17,21,28,29,38,40,68,70,75,80,109,115,129,130,143,144].…”

Section: Clinical Mastitismentioning

confidence: 99%

“…Some authors suggested using two thresholds to distinguish 'healthy' from 'infected' udders (140 000 and 340 000 cells/mL, [120]) or 'minor' from 'major' pathogen IMI (244 000 and 10 6 cells/mL, [144]). …”

Section: Punctual Approach (And Single Threshold)mentioning

confidence: 99%

Mastitis of dairy small ruminants

et al. 2003

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-Staphylococci are the main aetiological agents of small ruminants intramammary infections (IMI), the more frequent isolates being S. aureus in clinical cases and coagulase negative species in subclinical IMI. The clinical IMI, whose annual incidence is usually lower than 5%, mainly occur at the beginning of machine milking and during the first third of lactation. These features constitute small ruminant peculiarities compared to dairy cattle. Small ruminant mastitis is generally a chronic and contagious infection: the primary sources are mammary and cutaneous carriages, and spreading mainly occurs during milking. Somatic cell counts (SCC) represent a valuable tool for prevalence assessment and screening, but predictive values are better in ewes than in goats. Prevention is most often based on milking machine management, sanitation and annual control, and milking technique optimisation. Elimination mainly relies on culling animals exhibiting clinical, chronic and recurrent IMI, and on drying-off intramammary antibiotherapy; this treatment allows a good efficacy and may be used selectively by targeting infected udders only. Heritability values for lactation mean SCC scores are between 0.11 and 0.15. Effective inclusion of ewe's mastitis resistance in the breeding goal has recently been implemented in France following experimental and large scale estimations of genetic parameters for SCC scores.ewe / goat / mastitis / somatic cell count / epizootiology

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“…As células somáticas sofrem elevações em suas contagens quando ocorrem os casos de mastite, na forma clínica e subclínica, com intensidade variável da resposta em função do tipo e virulência do agente etiológico envolvido no processo infeccioso (Fthenakis & Jones 1990, Fthenakis et al 1991, De La Fuente et al 1993, Suarez et al 2002, Winter et al 2003.…”

Section: Introdução Introdução Introdução Introdução Introduçãounclassified

Aspectos clínicos e características do leite em ovelhas com mastite induzida experimentalmente com Staphylococcus aureus

et al. 2007

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RESUMO RESUMO RESUMO RESUMO RESUMO.-Este trabalho teve por objetivo estudar os aspectos clínicos e as características físico-químicas do leite em ovelhas com mastite induzida experimentalmente com Staphylococcus aureus. Foram utilizados dez animais da raça Santa Inês, com peso médio de 30 kg, fêmeas, primíparas recém-paridas, mantidos em apriscos e clinicamente sadios. Após se estabelecer os padrões de normalidade para as variáveis estudadas, os animais foram inoculados experimentalmente numa mama com uma cepa de S. aureus, empregando-se o inóculo de 1,0x10 4 ufc/ ml, enquanto a outra serviu como controle. As observações clínicas e laboratoriais foram realizadas nos intervalos de 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 168, 180, 288 The objective was to study the clinical aspects and the physical-chemical characteristics of the milk in sheep with mastitis experimentally induced with Staphylococcus aureus. For such, were used 10 Santa Inês primiparity ewes, weighing 30 kg, clinically healthy and housed in a stall. After establishing the normality patterns for the studied variables, the animals were inoculated into one teat of the udder with an inoculum of 1.0x10 4 ufc/ml of S. aureus, while the other gland served as control. The clinical observations were accomplished in intervals of 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 168, 180, 288 and 336 hours after the inoculation of the agent (PI). All the animals presented clinical systemic manifestations, and in the inoculated glands with more intensity from 24 hours on after the inoculation. There were significant alterations (P<0.05) in the production and physical-chemical composition of the milk in relation to the controls, with reduction of volume and fat. The pH, the chlorates and CCS reached very high indexes, accompanied by the CMT test reaction. The bacteriological exam revealed the presence of S. aureus during the phase of infection. After the treatment of the sheep 36 hours PI, one animal came to death 48h PI, and the others showed clinical recovery; however there was no physiologic re-establishment of the inoculated udders which lost their function.INDEX TERMS: Mastitis in sheep, Staphylococcus aureus, milk, somatic cell count.

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Effect of Infectious Status and Parity on Somatic Cell Count and California Mastitis Test in Pampinta Dairy Ewes

Cited by 28 publications

References 8 publications

Health management practices and disease prevalence in dairy sheep systems in Argentina

Health management practices and disease prevalence in dairy sheep systems in Argentina

Mastitis of dairy small ruminants

Aspectos clínicos e características do leite em ovelhas com mastite induzida experimentalmente com Staphylococcus aureus

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