Cepas atenuadas de Babesia bovis e Babesia bigemina e de Anaplasma centrale como imunógenos no controle da tristeza parasitária bovina

Sacco, A. M. S.; Kessler, Raul H.; Madruga, C. R.

doi:10.1590/s0103-84782001000500018

Cited by 5 publications

(5 citation statements)

References 13 publications

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“…This period corresponds to an increase in R. microplus count. Intense infestations by Arthropoda vectors and consequent inoculation of hemoparasites may lead to severe manifestations of disease across cattle of all age groups, causing high rates of morbidity and mortality (SACCO et al, 2001). Here, we demonstrated that enrofloxacin was effective in controlling acute anaplasmosis among calves of the ST group, even during the rainy season.…”

Section: Hemoparasitesmentioning

confidence: 68%

Effects and costs of a strategic selective treatment for controlling ecto - and hemoparasitosis in Holstein Friesian calves

Barbieri

Blanco

Lima

et al. 2016

SCA

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This work assessed the effectiveness and net operational costs of a strategic selective treatment for controlling ectoparasites (Rhipicephalus microplus, as well as Dermatobia hominis and Cochliomyia hominivorax larvae) and hemoparasites (Anaplasma marginale and Babesia spp.) in Holstein Friesian calves. Thirty calves were equally distributed in two groups: ST) strategic selective treatment and CT) conventional treatment. From birth, calves were monitored biweekly until 12 months of age. The CT group was subjected to parasite control according to directions provided by the veterinarian at the Experimental Farm of the Federal University of Lavras (FE/UFLA), whereas parasite control of the ST group followed criteria we had previously established. The ST group experienced fewer changes in physical traits on average and lower globular volume (GV) than the CT group (p < 0.05). Approximately 23% of ST calves exhibited external omphalitis, compared with 48% CT calves (p < 0.001). Additionally, ST calves were less affected than CT calves (p < 0.05) by R. microplus females and D. hominis larvae. Seropositivity rates from the indirect immunofluorescence reaction for A. marginale and B. bovis were similar for both groups (ST: 85.6% and 87.8%, respectively; CT: 83.2% and 83.2%). Additionally, subclinical (asymptomatic infection) anaplasmosis predominated in both groups during the dry period of the year. The daily average weight gains (DWG) were identical among ST (580 g) and CT (570 g), but the effective operational cost (EOC) was 3.7 times greater in ST (R$ 406.58/animal) compared with CT (R$ 110.90/animal). Laboratory exams to monitor the animals represented the largest share of the cost (82.7%) in ST, whereas drug expenses represented the highest costs (49.8%) in CT. Despite having a greater EOC, ST was more efficient at reducing parasite burdens than CT. Calves in the former group presented fewer R. microplus or D. hominis, and experienced a lower percentage of hemolytic anemia (VG < 24%). However, ST no affected the dynamic of A. marginale-and B. bovis-related infections, indicating that the FE/UFLA may be characterized as enzootically stable for these species. ResumoObjetivou-se avaliar a eficácia e os custos operacionais efetivos de um tratamento estratégico seletivo no controle de ecto (Rhipicephalus microplus e, larvas de Dermatobia hominis e Cochliomyia hominivorax) e hemoparasitos (Anaplasma marginale e Babesia spp.), em bezerras da raça holandesa, na Fazenda Experimental da Universidade Federal de Lavras (FE-UFLA), MG. Trinta bezerras foram distribuídas igualmente em dois grupos: TE) Tratamento estratégico seletivo e TC) Tratamento convencional. As bezerras foram monitoradas a cada 14 dias desde o nascimento até os 12 meses de idade. O controle de ecto e hemoparasitos, no TC, foi realizado de acordo com a orientação do médico veterinário responsável pela FE-UFLA. No TE, esse controle de parasitos seguiu critérios, previamente, estabelecidos pelos pesquisadores deste estudo. Nas análises estatísticas uti...

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Section: Hemoparasitesmentioning

confidence: 68%

Effects and costs of a strategic selective treatment for controlling ecto - and hemoparasitosis in Holstein Friesian calves

Barbieri

Blanco

Lima

et al. 2016

SCA

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“…It is considered one of the health problems of greatest economic damage in cattle raising, which translates into high rates of mortality and morbidity, with a significant reduction in the production of milk and/or meat, causing high cost with special handling and treatments [9][8] [10]. The basic clinical symptoms are: fever, anemia, lack of appetite, among others [9] [8]. Tropical and subtropical climates facilitate the vector's direct action on the host, which greatly affects cattle ranching in these climates [10].…”

Section: Introductionmentioning

confidence: 99%

“…2021 developing adequate specific immunity and becoming sensitive adults. These places or regions are known as epidemic, unstable or of enzootic instability, that is, where an outbreak of clinical disease can occur, with a large number of deaths [9].…”

Section: Introductionmentioning

confidence: 99%

Uso da espectroscopia de infravermelho próximo com Transformada de Fourier (FT-NIR) para acompanhar o processo de Tristeza Parasitária Bovina / Use of near-infrared spectroscopy with Fourier Transform (FT-NIR) to accompany the Bovine Parasitic Sadness process

Luiz¹,

Teixeira²,

Campos³

et al. 2021

Braz. J. Anim. Environ. Res.

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Cattle are animals that stay in the herd for a large period of the day in the open air pasture. This daily routine leaves them exposed and susceptible to infectious diseases. One of them is the Bovine Parasitic Sadness which is considered one of the greatest cattle health problems due its high rate of mortality and morbidity. In this work preliminary results are presented from calf inoculated with anaplasmosis. Blood samples were collected and analyzed through Fourier Transform Near Infrared spectroscopy (FT-NIR). The animal was monitored for 60 days until its recovery. This exploratory work shows the potentiality of the FT-NIR in the detection, follow-up and recovery of the anaplasmosis. The possibility of prevention of this disease in the herd via a fast optical analysis may bring a great breakthrough in disease control in dairy and beef cattle.

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“…Em princípio, surtos de TPB não ocorreriam em áreas com características de estabilidade enzoótica como o Rio de Janeiro. Contudo, intensas infestações por carrapatos e, conseqüente inoculação de grande número de parasitos pode levar animais de diferentes idades a desenvolverem doença severa, muitas vezes com alta morbidade e mortalidade, especialmente em animais subnutridos e com baixa resistência imunológica (SACCO et al, 2001). Neste estudo, foi evidenciado que em condições favoráveis, surtos podem ocorrer mesmo em bezerros de vacas que já sofreram a infecção e, portanto, receberam imunidade colostral.…”

Section: Introductionunclassified

Infecção natural por hemoparasitos em bezerros submetidos à quimio-profilaxia aos 30 dias de idade

Silva¹,

Corrêa

Botteon

et al. 2007

Rev. Bras. Parasitol. Vet.

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RESUMOOs carrapatos causam danos aos seus hospedeiros tanto pela ação espoliadora e ingestão de sangue quanto pela transmissão de agentes patogênicos, sendo também responsáveis por elevados gastos com produtos carrapaticidas, mão-de-obra e equipamentos para o controle (CORDOVÉS, 1997 The tick-borne disease (TBD) brings great damages to cattle breeding. The most important etiologic agents are Babesia bigemina, B. bovis and Anaplasma marginale, being the tick Boophilus microplus the main vector. This work reports the occurrence of natural infection by hemoparasites of TBD in 36 calves with high ticks natural infestation submitted to chemoprophylaxis with 30 days year-old. The blood smears from animals of different ages were analized and were found B. bigemina (33.3%), B. bovis (11.1%) and A. marginale (13.9%). Six animals had clinical symptoms (16.7%) and one dead (2.8%). The number of clinical cases ocurred in consequence of an association of factors as high infestation of ticks and low passive immunity in period that calves had not developed enough active immunity.

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Cepas atenuadas de Babesia bovis e Babesia bigemina e de Anaplasma centrale como imunógenos no controle da tristeza parasitária bovina

Abstract: RESUMO Neste trabalho foram avaliadas cepas atenuadas de

Cited by 5 publications

References 13 publications

Effects and costs of a strategic selective treatment for controlling ecto - and hemoparasitosis in Holstein Friesian calves

Effects and costs of a strategic selective treatment for controlling ecto - and hemoparasitosis in Holstein Friesian calves

Uso da espectroscopia de infravermelho próximo com Transformada de Fourier (FT-NIR) para acompanhar o processo de Tristeza Parasitária Bovina / Use of near-infrared spectroscopy with Fourier Transform (FT-NIR) to accompany the Bovine Parasitic Sadness process

Infecção natural por hemoparasitos em bezerros submetidos à quimio-profilaxia aos 30 dias de idade

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