Prevalence, risk factors and vectors identification of bovine anaplasmosis and babesiosis in and around Jimma town, Southwestern Ethiopia

Abdela, Nejash; Ibrahim, Nuraddis; Begna, Feyissa

doi:10.1016/j.actatropica.2017.09.010

Cited by 25 publications

(20 citation statements)

References 22 publications

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“…It was observed that calves from the group 2 had a higher prevalence of A. marginale infection, thus corroborating with authors who associate the increase in age with an increase in CTF prevalence (Ibrahim et al, 2013;Silva et al, 2015;Abdela et al, 2018). Low frequency of B. bigemina infection was observed in the same group.…”

Section: Discussionsupporting

confidence: 88%

“…The lower prevalence of Anaplasma infection in younger animals can be attributed to restricted grazing which reduces the probability of contact with vectors (hematophagous flies and ticks). In addition, the lower prevalence detected in young animals can be attributed to passive immunity transmitted during colostrum ingestion (Abdela et al, 2018). In addition, the tick life stage influences the transmission dynamics of Babesia spp.…”

Section: Discussionmentioning

confidence: 99%

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Characterization of cattle tick fever in calves from the northwestern region of Minas Gerais, Brazil

Bahia

Silva

Gontijo

et al. 2020

Rev. Bras. Parasitol. Vet.

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The present study aimed to characterize the importance of the Anaplasma marginale, Babesia bovis and Babesia bigemina in the genesis of cattle tick fever (CTF) among dairy calves in the northwest of Minas Gerais, Brazil. Blood samples from 300 calves were collected, followed by DNA extraction and nested PCR using oligonucleotide primers to amplify fragments of the semi-nested for the msp5 gene (A. marginale), sbp-4 (B. bovis) and rap-1a (B. bigemina) Among the examined calves, the prevalence of A. marginale was 55.6% (n=167/300), B. bovis was 4.0% (n=12/300) and B. bigemina was 15.3% (n=46/300), by PCR techniques. Parasitic forms of A. marginale and B. bigemina were found in 36,3% and 2,6% of the blood smears while B. bovis was not detected. There was a statistical difference between the positivity of infected animals in the age groups 1 (10-70 days) and (>70-300 days) for A. marginale and B. bigemina. A total of 15 calves with the classic symptoms of disease were examined, and the samples obtained were confirmed as a simple infection by A. marginale through semi-nested PCR. These results confirm bovine anaplasmosis as the primary cause of CTF among the calves of dairy cattle within the studied area.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Characterization of cattle tick fever in calves from the northwestern region of Minas Gerais, Brazil

Bahia

Silva

Gontijo

et al. 2020

Rev. Bras. Parasitol. Vet.

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“…The absence of regular control of the vectors and the extensive husbandry of the animals favor constant contact of the animals with the hemoparasite, reinforcing the animals' immunity against the causative agent of the clinical disease. There was no relation between the sex of the animals and A. marginale infection (p = 0.983) [21,22]. Also the category of animal was not found to be a factor affecting the prevalence of infection in the Crioula Lageana.…”

Section: Discussionmentioning

confidence: 81%

High prevalence of Anaplasma marginale in the Crioula Lageana cattle

Casa

Vettori

Souza

et al. 2020

J Infect Dev Ctries

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Introduction: Bovine anaplasmosis is caused by the bacterium Anaplasma marginale; its transmission occurs through vectors such as ticks. Crioula Lageana is a native cattle breed from the South of Brazil used for beef production, with excellent meat quality. There are no studies of the epidemiology of this disease in Crioula Lageana even though tick damage is known to be frequent. Methodology: Blood samples were collected from 311 Crioula Lageana cattle and subjected to DNA extraction and polymerase chain reaction (PCR) using specific primers for the Major Surface Protein 5 (msp5) gene for the detection of the bovine anaplasmosis agent. The animals were classified according to the gender, the category and the presence or absence of ticks at the time of collection. The animal owners completed an epidemiological questionnaire to determine factors that might be associated with anaplasma infection. Results: The prevalence of A. marginale was 79.9%. The following factors were found to be protective against infection: I) the breeding objectives (whether animals were destined for beef production and trade or solely for beef production), II) tick control rate; and III) pregnant and lactating cows and calves as the categories least affected by the hemoparasite. The main risk factor for hemoparasite acquisition was the use of organophosphates and avermectins as acaricides. Conclusions: Crioula Lageana cattle are in a situation of enzootic stability, with a high prevalence of A. marginale infection. The factors associated with the infection were: I) breeding objectives, II) tick control rate, III) the acaricides used, and IV) the most tick-parasitized categories of cattle.

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“…Manual habitat modification for tick control can affect both immature and adult ticks. For example, the removal of vegetation that shelters immature ticks can reduce their population levels [ 117 ]. In addition, physical modification of tick habitats can be used to control adult ticks at the livestock interface.…”

Section: Risk Reduction: Tick-targeted Approachesmentioning

confidence: 99%

“…Studies investigating overall tick burden have found that a single spelling/rotation period annually is thought to be promising if combined with acaricide treatments in an integrated pest management approach [ 119 ]. However, rotational grazing strategies (frequent movement of cattle between different pens) in the presence [ 117 ] and absence [ 119 ] of acaricide treatment have also been shown to be effective. Pasture management, including rotational grazing of cattle in Australia and in Zambia, as a tick control strategy is believed to be responsible for an overall decrease in tick burdens on livestock animals [ 120 , 121 ].…”

Section: Risk Reduction: Tick-targeted Approachesmentioning

confidence: 99%

Towards a Sustainable One Health Approach to Crimean–Congo Hemorrhagic Fever Prevention: Focus Areas and Gaps in Knowledge

et al. 2020

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Crimean–Congo hemorrhagic fever virus (CCHFV) infection is identified in the 2018 World Health Organization Research and Development Blueprint and the National Institute of Allergy and Infectious Diseases (NIH/NIAID) priority A list due to its high risk to public health and national security. Tick-borne CCHFV is widespread, found in Europe, Asia, Africa, the Middle East, and the Indian subcontinent. It circulates between ticks and several vertebrate hosts without causing overt disease, and thus can be present in areas without being noticed by the public. As a result, the potential for zoonotic spillover from ticks and animals to humans is high. In contrast to other emerging viruses, human-to-human transmission of CCHFV is typically limited; therefore, prevention of spillover events should be prioritized when considering countermeasures. Several factors in the transmission dynamics of CCHFV, including a complex transmission cycle that involves both ticks and vertebrate hosts, lend themselves to a One Health approach for the prevention and control of the disease that are often overlooked by current strategies. Here, we examine critical focus areas to help mitigate CCHFV spillover, including surveillance, risk assessment, and risk reduction strategies concentrated on humans, animals, and ticks; highlight gaps in knowledge; and discuss considerations for a more sustainable One Health approach to disease control.

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Prevalence, risk factors and vectors identification of bovine anaplasmosis and babesiosis in and around Jimma town, Southwestern Ethiopia

Cited by 25 publications

References 22 publications

Characterization of cattle tick fever in calves from the northwestern region of Minas Gerais, Brazil

Characterization of cattle tick fever in calves from the northwestern region of Minas Gerais, Brazil

High prevalence of Anaplasma marginale in the Crioula Lageana cattle

Towards a Sustainable One Health Approach to Crimean–Congo Hemorrhagic Fever Prevention: Focus Areas and Gaps in Knowledge

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