Anaplasmosis in improved boer goats in South Africa artificially infected with Anaplasma ovis

Barry, D.M.; Niekerk, C.H. van

doi:10.1016/0921-4488(90)90093-l

Cited by 24 publications

(7 citation statements)

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“…3 In particular, this earlier experimental infection study showed that Anaplasma can pass through the placenta to the red blood cells of the fetus to cause fetal death in utero. 3 There are limitations to our study. The sample size calculated for the study was based on total ruminant farms, the study tested only 3 animals per farm, and a confirmatory test was not performed.…”

Section: Brief Communicationmentioning

confidence: 98%

Anaplasma spp. in dairy ruminants in Jordan: high individual and herd-level seroprevalence and association with abortions

Obaidat

Salman

2019

J VET Diagn Invest

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We estimated the seroprevalence of, and associated risk factors for, anaplasmosis in dairy cows, sheep, and goats in all regions of Jordan. Apparently healthy animals from 135 farms (31 cow, 68 sheep, and 36 goat farms) were tested for Anaplasma spp. antibodies by a competitive ELISA. At the farm level, 36%, 94%, and 94% of cow, sheep, and goat farms, respectively, were seropositive for Anaplasma spp. At the individual animal level, 22%, 89%, and 82% of the tested cows, sheep, and goats, respectively, were seropositive, which demonstrates widespread and high seroprevalence of Anaplasma spp. in dairy farms in Jordan. Seroprevalence did not vary between regions. Using the Fisher exact test, there was a significant association between high seroprevalence and recent abortion in small ruminants. There is an urgent need for further investigation of this disease, and the potential role of Anaplasma spp. in abortions, on dairy farms in Jordan.

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Section: Brief Communicationmentioning

confidence: 98%

Anaplasma spp. in dairy ruminants in Jordan: high individual and herd-level seroprevalence and association with abortions

Obaidat

Salman

2019

J VET Diagn Invest

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“…Among Anaplasma species, A. ovis, which infects sheep, goat, and deer, is an obligate intraerythrocytic bacterium and the causative agent ovine anaplasmosis (Friedhoff 1997). In small ruminants, infection is usually subclinical; occa-sionally, it can be severe with hemolytic anaemia, hemoglobinuria, and fever (Barry and Van Niekerk 1990, Stoltsz 1994, Hornok et al 2007). In addition, A. ovis infection may predispose to other infectious and/or parasitic diseases that aggravate an animal's condition, occasionally leading to death (Kocan et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Molecular Survey ofAnaplasmaSpecies in Small Ruminants Reveals the Presence of Novel Strains Closely Related toA. phagocytophilumin Tunisia

Saïd

Belkahia

Alberti

et al. 2015

Vector-Borne and Zoonotic Diseases

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A survey of Anaplasma species in small ruminants is still lacking in North African countries. In this study, the presence of A. phagocytophilum, A. phagocytophilum-related species, and A. ovis was investigated in a total of 563 healthy small ruminants (303 goats and 260 sheep), from 25 randomly selected flocks sampled in Tunisia. Anaplasma spp. and A. ovis overall infection rates were 95.0% and 93.8% in sheep and 69.6% and 65.3% in goats, respectively. A. phagocytophilum was not detected in any of tested animals. A total of 20 sheep (7.7%) and 144 goats (47.5%) were infected by Anaplasma strains genetically related to A. phagocytophilum. Both in sheep and goats A. ovis prevalence was higher in adults (≥2 years) than in young (<2 years) subjects (p = 0.001 and 0.002 for goats and sheep, respectively). In sheep, A. ovis prevalence was higher in ewes with respect to rams (p = 0.010). The A. ovis infection rate was significantly lower in goats of the local breed (p = 0.049) and it was higher in goats infested by ticks than in not infested animals (p = 0.005). Genetic analysis of the msp4 gene of A. ovis indicated the presence of strains shared by Tunisian sheep and goats. Sequence analysis and phylogenetic studies on the basis of the 16S rRNA gene provided evidence for the circulation of at least two different potentially novel species genetically related to A. phagocytophilum in Tunisian small ruminants. These findings cause concern about specificity of serological tests used for detection of A. phagocytophilum in ruminants and provide additional information for elucidating pathogenesis and molecular epidemiology of A. phagocytophilum and related species.

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“…Tick borne fever is not known to occur in goats, babesiosis is highly susceptible in sheep than in goats. Anaplasmosis in goats is a subclinical, non-pathogenic, mild febrile disease with little economic importance ( Barry & Van Niekerk, 1990 ). Ticks and their associated challenges are controlled mainly using conventional acaricides in cattle with goats often being ignored.…”

Section: Resultsmentioning

confidence: 99%

“…(2003) ) Book chapter Y Y Y Y Y Y Y H Masika and Afolayan (2003) Participatory rural appraisal Y Y Y Y Y Y Y H 2000 Regassa (2000) Structured questionnaire Y Y Y Y Y Y Y H 1998 Dreyer et al. (1998) Experimental Y Y Y Y Y Y Y H 1996 Yunker (1996) Review Y Y Y CT YY Y Y H 1990 Barry and Niekerk (1990) Technical note Y Y Y Y Y Y Y H …”

Section: Appendixmentioning

confidence: 99%

Indigenous knowledge to mitigate the challenges of ticks in goats: A systematic review

Mkwanazi

Ndlela

Chimonyo

2021

Veterinary and Animal Science

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The review collates the documented use of IK used in goats for controlling ticks and records the bioactivity testing that has been carried out on these plants. A literature survey was conducted on the use of IK whereby ethno-veterinary medicine (EVM) is used as well as on the investigations relating to the potential efficacy of the used plants. In Sub-Saharan Africa (SSA), ticks rank the first amongst the ectoparasites that limit goat productivity. Infrequent and overuse of acaricides have resulted in the development of resistance in ticks as well as environmental impacts. To combat these impacts, contribution of IK needs to be appreciated. In total 21, ethno-veterinary plant species, belonging to 16 families were identified to control ticks. These included plants such as Lippia javanica (Burm.f.) Spreng, Cissus quadrangularis .L, and Aloe ferox Mill, Grandifolia Warb, Terminalia brownii Fresen and Aloe volkensii Engl. Efficacy of plant species such as Pelargonium reniforme Curtis and Eucomis punctata L'Hér is enhanced by mixing them with substances like potassium permanganate and river salt to enhance the effectiveness of the extract. Ethno-veterinary plants have a wide range of phytochemicals, which include alkaloids, tannins, flavonoids, anti-microbial and pesticidal effects that produces tick repellent effects. The most common plant parts used during preparations are roots, leaves, barks, fruits and young shoots and to a lesser extent flowers, although the use of leaves usually takes precedence. Non-plant materials involve the use of methods such as traditional practices where ticks are manually removed. using hand picking. Oral administration and direct application on the infested site are used. It is, thus important to conduct more work on the conservation of ethnoveterinary plants, IK information gathering and dissemination.

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Anaplasmosis in improved boer goats in South Africa artificially infected with Anaplasma ovis

Cited by 24 publications

References 0 publications

Anaplasma spp. in dairy ruminants in Jordan: high individual and herd-level seroprevalence and association with abortions

Anaplasma spp. in dairy ruminants in Jordan: high individual and herd-level seroprevalence and association with abortions

Molecular Survey ofAnaplasmaSpecies in Small Ruminants Reveals the Presence of Novel Strains Closely Related toA. phagocytophilumin Tunisia

Indigenous knowledge to mitigate the challenges of ticks in goats: A systematic review

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