Apparent prevalence of Mycoplasma wenyonii, Candidatus Mycoplasma haemobos, and bovine leukemia virus in Wisconsin and Michigan dairy cattle herds

Schambow, Rachel; Poulsen, Keith P.; Bolin, Steven R.; Krahn, D.; Norby, Bo; Sockett, Donald C.; Ruegg, P.L.

doi:10.3168/jdsc.2020-0033

Cited by 8 publications

(6 citation statements)

References 28 publications

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“…Thus, it is likely that the Mycoplasma circulated for some time in another, unknown reservoir host, diverged, and then contaminated the herd at several time points with different strains or alternatively was maintained in the herd for an extended period of time. Moreover, the mode of transmission is not known, but it has been suggested that insects that can transfer blood may play a role in the spread of M. wenyonii [26,27]. To the authors' knowledge, M. wenyonii DNA has only been detected once in a tick in Europe and that was in an I. ricinus tick collected from an infected animal [28].…”

Section: Prevalence Of Infectious Agents In Cattlementioning

confidence: 84%

“…M. wenyonii is a haemoplasma that infects erythrocytes in cattle. This and another haemoplasma, M. haemobos, have been implicated in severe diseases in both Europe and the USA [26,27,29,30]. However, their clinical importance has been questioned because both haemoplasmas have been detected in sick as well as healthy cattle [31,32].…”

Section: Prevalence Of Infectious Agents In Cattlementioning

confidence: 99%

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A Disease Outbreak in Beef Cattle Associated with Anaplasma and Mycoplasma Infections

Waller

Dahlgren²,

Grandi

et al. 2023

Animals

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An outbreak of disease in a Swedish beef cattle herd initiated an in-depth study to investigate the presence of bacteria and viruses in the blood of clinically healthy (n = 10) and clinically diseased cattle (n = 20) using whole-genome shotgun sequencing (WGSS). The occurrence of infectious agents was also investigated in ticks found attached to healthy cattle (n = 61) and wild deer (n = 23), and in spleen samples from wild deer (n = 30) and wild boars (n = 10). Moreover, blood samples from 84 clinically healthy young stock were analysed for antibodies against Anaplasma phagocytophilum and Babesia divergens. The WGSS revealed the presence of at least three distinct Mycoplasma variants that were most closely related to Mycoplasma wenyonii. Two of these were very similar to a divergent M. wenyonii variant previously only detected in Mexico. These variants tended to be more common in the diseased cattle than in the healthy cattle but were not detected in the ticks or wild animals. The DNA of A. phagocytophilum was detected in similar proportions in diseased (33%) and healthy (40%) cattle, while 70% of the deer, 8% of ticks collected from the cattle and 19% of the ticks collected from deer were positive. Almost all the isolates from the cattle, deer and ticks belonged to Ecotype 1. Based on sequencing of the groEL-gene, most isolates of A. phagocytophilum from cattle were similar and belonged to a different cluster than the isolates from wild deer. Antibodies against A. phagocytophilum were detected in all the analysed samples. In conclusion, uncommon variants of Mycoplasma were detected, probably associated with the disease outbreak in combination with immune suppression due to granulocytic anaplasmosis. Moreover, A. phagocytophilum was found to be circulating within this cattle population, while circulation between cattle and deer occurred infrequently.

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Section: Prevalence Of Infectious Agents In Cattlementioning

confidence: 84%

Section: Prevalence Of Infectious Agents In Cattlementioning

confidence: 99%

A Disease Outbreak in Beef Cattle Associated with Anaplasma and Mycoplasma Infections

Waller

Dahlgren²,

Grandi

et al. 2023

Animals

View full text Add to dashboard Cite

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“…Elsewhere, higher prevalence than the results from this study were also reported. For example, the prevalence of 32.2% in Cuba [16], 28.6% in the Philippines [36], 64.2% in Brazil [19] and >90% in Japan and USA [17,18]. The variations in prevalence may be due to differences in laboratory procedures, climatic conditions, study population characteristics and sampling methods.…”

Section: Discussionmentioning

confidence: 99%

Mycoplasma wenyonii and Candidatus Mycoplasma Haemobos in Pastoralists Cattle in Nigeria

Kamani,

Shand,

Shekaro

et al. 2023

Acta Parasit.

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The extensive migration practiced by pastoralists cattle exposes them to a variety of pathogens and vectors which may sometimes lead to severe disease outcomes. Moreover, the synergistic effect of multiple parasitism on the productivity of livestock has been well recognized. This is particularly true where the livestock production system predisposes the animals to constant and heavy infestation with arthropod vectors. Methods:The presences, prevalence and risk factors for hemotropic Mycoplasma (hemoplasma) infection in cattle in Nigeria was investigated using a PCR and sequencing approach. DNA, extracted from 566 cattle blood samples, collected from 10 states from the three agro-ecological zones (AEZs) of Nigeria, from April 2021 to March 2022, were screened for the presences of hemotropic Mycoplasma spp. DNA. Results:The DNA of hemoplasmas was detected in 48 out of the 566 (8.5%) samples, 12 (25%) of them were identified as Mycoplasma wenyonii and 19 (38.6%) as 'Candidatus Mycoplasma haemobos'. Coinfection with both species was detected in 17 (35.4%) of the samples. High prevalence and risk of hemoplasmas infection was associated with sex of the cattle (bulls were more affected; p=0.005) and the Packed Cell Volume (p=0.009), but not with the age (p=0.08), breed (p=0.22), body condition (p=0.052), source of the samples (p=0.45) or the AEZs (0.59). This is the first nationwide survey of hemotropic mycoplasmas in cattle in Nigeria using this molecular approach. Conclusion:Further studies to determine the veterinary and public health significance of these pathogens, which were previously associated with varying degrees of clinical signs and production losses, are recommended in Nigerian cattle.

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“…In the same study, infections with Mycoplasma wenyonii were reported [ 29 ]. Coinfection with both Mycoplasma species have been reported in different places [ 30 , 31 ]. Interestingly, using DNA sequence analysis of unmapped reads, we could also identify one animal that was detected with DNA of both Mycoplasma species.…”

Section: Discussionmentioning

confidence: 99%

Unmapped short reads from whole-genome sequencing indicate potential infectious pathogens in German Black Pied cattle

Neumann,

Korkuć,

Reißmann

et al. 2023

Vet Res

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When resequencing animal genomes, some short reads cannot be mapped to the reference genome and are usually discarded. In this study, unmapped reads from 302 German Black Pied cattle were analyzed to identify potential pathogenic DNA. These unmapped reads were assembled and blasted against NCBI’s database to identify bacterial and viral sequences. The results provided evidence for the presence of pathogens. We found sequences of Bovine parvovirus 3 and Mycoplasma species. These findings emphasize the information content of unmapped reads for gaining insight into bacterial and viral infections, which is important for veterinarians and epidemiologists.

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Apparent prevalence of Mycoplasma wenyonii, Candidatus Mycoplasma haemobos, and bovine leukemia virus in Wisconsin and Michigan dairy cattle herds

Cited by 8 publications

References 28 publications

A Disease Outbreak in Beef Cattle Associated with Anaplasma and Mycoplasma Infections

A Disease Outbreak in Beef Cattle Associated with Anaplasma and Mycoplasma Infections

Mycoplasma wenyonii and Candidatus Mycoplasma Haemobos in Pastoralists Cattle in Nigeria

Unmapped short reads from whole-genome sequencing indicate potential infectious pathogens in German Black Pied cattle

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