Bovine respiratory disease research (1983–2009)

Fulton, Robert W.

doi:10.1017/s146625230999017x

Cited by 139 publications

(145 citation statements)

References 43 publications

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“…Although there are differences in the level of BRD-related mortality, all studies suggest that BRD is a major cause of mortality at beef cattle feedlots. Consequently, these data demonstrate that BRD is an important cause of mortality and morbidity at this feedlot with incidence levels compared to those described in the North America where there have been extensive and ongoing investigations of this important disease condition of cattle [6]. However, more investigations of the impact of BRD at feedlots from diverse cattle producing regions of Brazil are required to have an overall picture of the national effects of BRD on cattle herds.…”

Section: Discussionmentioning

confidence: 75%

“…The information herein obtained is of fundamental importance to guide and alert local beef cattle producers on the importance of curbing expenses associated with BRD, since there was no available data that considered the peculiarities associated with feedlot cattle production in Brazil. Consequently, the data contained in this study can be compared with those of similar investigations done in North America [24][25][26][27][28], where the impacts due to BRDrelated disease are well established [6].…”

Section: Discussionmentioning

confidence: 99%

“…The bovine respiratory disease (BRD) complex is a multifactorial and multi-etiological entity that is associated with several infectious agents [4][5][6], coupled with cattle management [4], and environmental factors [4,7]. BRD is the most important cause of livestock mortality in the USA in feedlots and is responsible for 16% of all non-predator losses of beef cattle [8].…”

Section: Introductionmentioning

confidence: 99%

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Bovine respiratory disease complex associated mortality and morbidity rates in feedlot cattle from southeastern Brazil

Baptista

Rezende

Fonseca

et al. 2017

J Infect Dev Ctries

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Introduction: A feedlot is an intensive farming system for finishing livestock. Bovine respiratory disease (BRD) is a cause of morbidity and mortality in beef cattle, especially in feedlots. Methodology: This study investigated the morbidity and mortality of BRD in a beef cattle feedlot in southeastern Brazil using: clinical diagnoses, therapy, morbidity, and mortality. Pulmonary fragments were collected from five steers, on feed from 3-32 days, with lesions of pneumonia for identification of BRD infectious agents PCR. Results: 188,862 steers were on feed and morbidity was 7.05% (13,315/188,862), mortality 0.64% (1,214/188,862). The causes of morbidity were: BRD (6.13%), lameness (0.29%), trauma (0.21%), clostridiosis (0.13%) and polioencephalomalacia, PEM (0.12%). The causes of mortality were: BRD (0.21%), trauma (0.17%), and clostridiosis (0.13%). When all sick cattle were considered (n=13,315), BRD (86.9%) was the principal cause of morbidity, followed by lameness (4.13%), trauma (3.05%), and clostridiosis (1.82%). The cost of BRD-associated cattle mortality and morbidity was estimated at $14,334.00/10,000 and $16,315.40/10,000 respectively. It was projected that the economic effects due to BRD-associated morbidity in Brazil were $6.31 million/annum, while losses due to mortality were $5.54 million, resulting in an annual loss of $11.85 million. Coinfections in cattle with pneumonia due to Mannheimia haemolytica and Pasteurella multocida were identified in 4/5 steers tested. Conclusions: This is the first longitudinal study that investigated the incidence of BRD in feedlot cattle from Brazil, and the results herein described indicate that BRD contributed significantly to the development of mortality and morbidity of cattle on feed.

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Section: Discussionmentioning

confidence: 75%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bovine respiratory disease complex associated mortality and morbidity rates in feedlot cattle from southeastern Brazil

Baptista

Rezende

Fonseca

et al. 2017

J Infect Dev Ctries

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“…Mycoplasma bovis infections could be diagnosed by bacteriological culture and serological methods [2,6,9,10] . Nevertheless, these methods are time consuming and false-negative results could be common [9] .…”

Section: öZetmentioning

confidence: 99%

Diagnosis of Mycoplasma bovis Infection in Cattle by ELISA and PCR

Akan¹,

Babacan²,

Torun³

et al. 2014

Kafkas Univ Vet Fak Derg

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SummaryMycoplasma bovis is one of the most pathogenic agents in the Mycoplasma species that cause disease in cattle. In particular, young calves at less than 4 months of age are a considerable risk from pneumonia caused by M. bovis. In this study, we investigated M. bovis from tracheal swabs and blood sera of cattle which showed respiratory symptoms. A total of 127 tracheal swab samples were collected from seven different farms in Turkey. In addition, a total 254 acute and convelance sera were collected from the same cattle at intervals 15 days. The materials were collected from cattle between 3-12 months of age that reported respiratory problems such as broncho-pneumonia with coughing, depression, lethargy and fever. Mycoplasma bovis was investigated in tracheal swab samples and sera collected from the cattle by using PCR and ELISA respectively. The PCR results showed that M. bovis infections were positive in 4 different farms. The rates ranged from 5.3% (1/19) to 37.5% (6/16). Out of the 127 cattle examined, 45 (35.4%) were positive for M. bovis antibodies, while 82 (64.6%) were found to be negative. All PCR positive cattle were also found to be positive by ELISA. However by using ELISA, M. bovis infections were positive in all farms and the ELISA positive rates ranged from 20% (2/10) to 68.8% (11/16). Considering these results, in especially chronic infections, ELISA is a more useful method than PCR to detect M. bovis infection. Keywords: Cattle, ELISA, Mycoplasma bovis, PCR Sığırlarda Mycoplasma bovis Infeksiyonunun ELISA ve PCR ile Teşhisi ÖzetMycoplasma bovis, Mycoplasma etkenleri içerisinde sığırlarda infeksiyona neden olan en patojen etkenlerden biridir. Özellikle, 4 aylık yaşın altındaki genç buzağılarda, M. bovis'in neden olduğu pnömonilerde artan bir risk bulunmaktadır. Bu çalışmada solunum sistemi infeksiyonu semptomları gösteren sığırların trachea svapları ve kan serumlarından M. bovis infeksiyonunun teşhisi ve M. bovis teşhisi için serolojik ve moleküler metodların karşılaştırılması amaçlanmıştır. Türkiye'de bulunan 7 farklı çiflikten gönderilen 127 tracheal svap örneği ile 15 gün arayla aynı sığırlardan alınan 254 adet akut ve konvelesans serum örneği PCR ve ELISA yöntemleriyle incelendi. Bu örnekler 3-12 aylık yaşlar da olan ve bronkopnömoni, öksürük, depresyon, halsizlik ve ateş gibi solunum sistemi infeksiyonu semptomu gösteren sığırlardan toplandı. Tracheal svap örneklerinin PCR sonuçlarına göre 4 farklı çiftik M. bovis infeksiyonu yönünden pozitif bulundu. Oranlar %5.3 (1/19) ile %37.5 (6/16) arasında bulundu. Mycoplasma bovis antikorları yönünden incelen 127 sığıra ait serumlarda, 45 (%35.4) adeti pozitif olarak saptandı; 82 (%64.6) serum ise negatif olarak saptandı. PCR'da pozitif olarak saptanan tüm sığırlar ELISA yöntemiyle de pozitif olarak saptandı. M. bovis infeksiyonu tüm çiftliklerde pozitif olarak saptandı ve ELISA oranları %20 (2/10) ile %68 (11/16) arasında değişkenlik gösterdi. Bu sonuçlar göz önüne alındığında, özellikle kronik infeksiyonlarda M. bovis infeksiyonunun teşhisinde ...

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“…A number of bacterial, viral and parasitic agents participate in sheep respiratory diseases, however most important include: mycoplasma species such as Mycoplasma ovipneumoniae, Mycoplasma.arginini, Mycoplasma agalactiae (Lin et al, 2008), lung worms particularly (Dictyocaulus filaria) (Borji et al, 2012) and bacteria like Pasteurella multocida, Manhemia haemolytica, Chlamydia psittaci, Histophilus somni, which can suppress the animal's immune system, allowing opportunistic microorganisms to colonize the lung and cause the disease (Angen et al,1998;Radostits et al, 2000;Tesfaye et al, 2013;Fulton, 2009;Alemneh and Tewodros, 2016).…”

Section: Introductionmentioning

confidence: 99%

Aerobic and anaerobic bacterial isolates from the respiratory tract of sheep slaughtered at Addis Ababa Abattoirs Enterprises, Central Ethiopia

Yegoraw¹,

Gebremeskel²,

Tesema³

et al. 2017

J. Vet. Med. Anim. Health

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The present study was an endeavor to isolate and identify the various bacteria localizing pneumonic lungs and the associated tracheas of sheep slaughtered at Addis Ababa Abattoirs Enterprise, Central Ethiopia, in both aerobic and anaerobic conditions. A total of 60 pneumonic lungs and 60 tracheal swabs were examined bacteriologically. From all the samples collected, a total of 440 bacterial isolates (239 from the aerobic culture and 201 from the anaerobic culture) were obtained. The result of aerobic isolates include: Staphylococcus species (31.38%), Pasteurella hemolytica (29.71%), Bacillus species (10.04%), Bibersteinia trehalosi (6.69%), Micrococcus (3.77%), Escherichia coli (3.35%), Streptococcus species (2.51%), Rhodococcus equi (2.93%), Pseudomonas species (2.09%), Klebsiella pnuemonea (0.84%), Actinobacillus species and Bordetella species (1, 29%); whereas Staphylococcus species (26.87%), P. hemolytica (37.81%), Bacillus species (3.98%), B. trehalosi (10.45%), Micrococcus (3.48), E. coli (6.97%), Streptococcus species (0.5%), Rhodococcus equi (0.5%), Klebsiella pneumoniae (2.99%) and Actinobacillus species (1.49%) were among anaerobic isolates. Thus, isolation of multiple bacterial species from the respiratory tracts of pneumonic sheep in this study signifies their possible role in the involvement of respiratory diseases. Appropriate prevention and control methods should be established along with identification of the most pathogenic species by future studies.

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Bovine respiratory disease research (1983–2009)

Cited by 139 publications

References 43 publications

Bovine respiratory disease complex associated mortality and morbidity rates in feedlot cattle from southeastern Brazil

Bovine respiratory disease complex associated mortality and morbidity rates in feedlot cattle from southeastern Brazil

Diagnosis of Mycoplasma bovis Infection in Cattle by ELISA and PCR

Aerobic and anaerobic bacterial isolates from the respiratory tract of sheep slaughtered at Addis Ababa Abattoirs Enterprises, Central Ethiopia

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