A.F. Vatta's research while affiliated with Ross University, School of Medicine and other places

Publications (28)

Article
Full-text available
A study was conducted to examine the duration of anthelmintic effect of copper oxide wire particles (COWP) in grazing goats, as data for the persistence of efficacy of COWP in this host species is limited. Forty-eight indigenous male goats were infected naturally by grazing them on Haemonchus contortus-infected pasture. When the faecal egg count (F...
Article
Full-text available
Haemonchosis is considered to be the most economically important gastrointestinal disease of small ruminants in the tropics and subtropics. However, chemical anthelmintics, which were the mainstay of control, have been compromised by a high prevalence of resistance worldwide. Copper oxide wire particles (COWP) have been shown to have anthelmintic e...
Article
A series of studies were conducted, over a 10-year period (1998–2008), in KwaZulu-Natal, one of the poorest provinces in South Africa, involving on-farm research and extension and small-scale goat farmers. Initially, two farmers in the Impendle region participated, followed by nine farmers in Bulwer and latterly, 15 farmers in Bergville. The genera...
Article
Following claims of anthelmintic activity of Cereus jamacaru DC (Cactaceae) by a commercial farmer, in vivo studies were conducted to determine the possible direct anthelmintic effects of the plant on ovine gastrointestinal nematodes. Eighteen sheep were infected with 4000 Haemonchus contortus and 6000 Trichostrongylus colubriformis larvae given in...
Article
Full-text available
Opportunities to train small-scale goat farmers within on-farm research projects - Volume 1 Issue 2 - A. F. Vatta, J. F. de Villiers, L. J. S. Harrison, R. C. Krecek, R. A. Pearson, F. H. J. Rijkenberg, A. Spickett, S. H. Worth
Article
Full-text available
The high prevalence of resistance of Haemonchus contortus to all major anthelmintic groups has prompted investigations into alternative control methods in South Africa, including the use of copper oxide wire particle (COWP) boluses. To assess the efficacy of COWP against H. contortus in indigenous South African goats, 18 male faecal egg-count-negat...
Article
Full-text available
________________________________________________________________________________ Abstract This study was conducted to determine if heart girth measurements can be used effectively in the prediction of live body weights of goats in KwaZulu-Natal (KZN), and to assist in developing a heart girth measuring tape. This is especially aimed at providing a...
Article
Full-text available
The potential economic benefits of combining tactical anthelmintic treatment for gastrointestinal nematodes and nutritional supplementation with urea-molasses blocks were examined in Boer goats raised under extensive grazing conditions in the summer rainfall area of South Africa. Eight groups of nine goats were monitored over a 12-month period from...
Article
This study took place in a small-scale goat farming community, where farmers considered that the major problems affecting goat health and productivity (diarrhea, gastrointestinal helminth infection, and poor reproductive performance) were exacerbated by a lack of information on goat health and management. The objective was to collaborate with the f...
Article
Full-text available
The TEG-Tsag gene of Taenia saginata is homologous to the genes expressing the two major surface antigens of Echinococcus spp. (EM10 and EG10). Surface antigens of parasites are logical candidates for vaccines, and in this paper we demonstrate that cattle vaccinated with the recombinant TEG-Tsag protein, either used singly or in conjunction with th...
Article
Full-text available
This study was carried out with the cooperation of farmers owning communally grazed indigenous goats in southwestern KwaZulu-Natal Province, South Africa, where farmers had identified poor reproductive performance in their herds as one of their major problems. The aim was to quantify the effects of 3 interventions and the interaction between these...
Article
Full-text available
FAMACHA is a practical on-farm system designed to provide small ruminant producers a tool for improving their management of Haemonchus contortus infections. Although this system has become very popular and widely accepted by small ruminant producers in many regions of the southern United States, there is very limited data reported on the effectiven...
Article
Full-text available
Recent studies on sheep and goat farms in the southern United States indicate that multiple-anthelmintic resistance in Haemonchus contortus is becoming a severe problem. Though many factors are involved in the evolution of resistance, the proportion of the parasite population under drug selection is believed to be the single most important factor i...
Article
Full-text available
From December 1998 to April 2000, a longitudinal study was conducted of the pooled trematode faecal egg counts of samples collected from goats of resource-poor farmers at Rust de Winter, Gauteng Province, Impendle, KwaZulu-Natal Province, and Kraaipan, North-West Province, South Africa. The amphistome faecal egg counts followed a seasonal pattem, w...
Article
Full-text available
A participatory research model was used in six village communities in the Central Region of the North West Province of South Africa in order to achieve the following broad objectives: to obtain information on the challenges owners face in raising livestock in these areas and to evaluate the livestock owners' level of knowledge of internal parasites...
Article
Full-text available
A longitudinal study was conducted on the differential faecal egg counts, haematocrits and body condition scores of sheep belonging to resource-poor farmers at Rust de Winter, Gauteng province, and Kraaipan, North West Province, South Africa. The animals were scored for level of anaemia using the FAMACHA method, an assay for the clinical evaluation...
Article
A longitudinal study was conducted of the nematode faecal egg counts (FECs) and body condition scores (BCSs) of goats of resource-poor farmers at Rust de Winter, Gauteng Province, Impendle, KwaZulu-Natal Province, and Kraaipan, North-West Province, South Africa. Periods of higher FECs occurred from December/January to March/April at Rust de Winter...
Article
The diversity and predominance of nematode genera in goats of resource-poor farmers at Rust de Winter, Gauteng Province, Impendle, KwaZulu-Natal Province, and Kraaipan, North-West Province, South Africa, was determined by means of a longitudinal study of the nematode faecal egg counts (FECs) and differential third-stage nematode larvae. The animals...
Article
A novel clinical assay for the assessment and subsequent treatment of Haemonchus infection in sheep to slow down the development of anthelmintic resistance--the FAMACHA system--has been developed, tested and validated in South Africa. The system is based on a colour chart with five colour categories depicting varying degrees of anaemia that are com...
Article
Full-text available
A workshop was held at Onderstepoort on 2-3 July 1999 to set priorities in veterinary helminthology for South Africa. Representatives from 19 organisations attended. The workshop achieved 2 of its 3 aims, namely to identify the priority areas within the field and to set specific objectives to be achieved in addressing these needs. Seven strategies...
Article
A workshop was held at Onderstepoort to set priorities in veterinary helminthology for South Africa. Representatives from 19 organisations attended. The workshop achieved 2 of the 3 aims set, namely to identify the problems within the field and to develop strategies to address these challenges. The 7 strategies proposed are: motivation, education,...
Article
Full-text available
A workshop was held at Onderstepoort to set priorities in veterinary helminthology for South Africa. Representatives from 19 organisations attended. The workshop achieved 2 of the 3 aims set, namely to identify the problems within the field and to develop strategies to address these challenges. The 7 strategies proposed are: motivation, education,...
Article
Full-text available
The Department for International Development (DFID) Animal Health Programme (AHP) is to fund a project (R8151) in South Africa from April 2002 for three years. It will test the hypothesis that under the farm management and agro-ecological conditions found in the resource-poor areas of the Republic of South Africa (RSA), the holistic approach of str...
Article
Full-text available
The potential economic benefits of combining strategic anthelmintic treatment for gastrointestinal nematodes and nutritional supplementation with urea-molasses blocks were examined in Boer goats, raised under extensive grazing conditions in the summer rainfall area of South Africa. Eight groups of nine goats were monitored over a 14- month period f...

Citations

... An analysis of extension methodologies in Tanzania emphasized the need to include greater participation by local farmers in planning and execution (Douglah & Sicilima, 1997). Vatta et al. (2008) conducted research on goat health with participation from Zulu farmers. Involving these farmers in the research process itself was associated with a subsequent increase in their effectiveness in farmer-to-farmer diffusion of knowledge. ...
... Fecal samples were collected directly per rectum. These eight ewes were also physically examined to evaluate body condition score (BCS) (Russel et al., 1969), anemia score (FA-MACHA©; Bath et al., 2001), hygiene score (Schreiner and Ruegg, 2002), and incisor and udder abnormalities. In groups containing more than 80 pre-partum ewes, additional ewes were physically examined in order to have at least 10 % of ewes represented, but blood and fecal samples were not taken from more than 8 ewes due to budget constraints for laboratory tests. ...
... Hassan et al. (2016), refieren que productores de bajos recursos poseen un inadecuado conocimiento sobre la prevención y tratamiento de enfermedades, por lo que requieren de asistencia técnica. De igual manera, Vatta et al. (2010), señalan que la capacitación constante brinda la oportunidad de facilitar la adquisición de habilidades a los pequeños caprinocultores. ...
... Animal identification results by FAMACHA © chart were similar to those obtained by other researchers but with either partial or formal trained staff ( Van Wyk and Bath, 2002;Vatta et al., 2011). The correlation between FAMACHA © and FEC diagnosis was quite high with an R 2 value of 0.91. ...
... Kendala kualitas dan kuantitas pakan dimusim kemarau dapat mempengaruhi produktifitas sapi Madura. Salah satu upaya yang dapat dilakukan untuk meningkatkan kualitas pakan dan konsumsi pakan dapat dilakukan dengan memberikan pakan tambahan seperti urea molasses block (UMB) atau urea molasses mineral block (UMMB) dapat meningkatkan konsumsi pakan ( Kioumarsi et al., 2012;Suharyono et al., 2014;Li et al., 2014) meningkatkan bobot badan sapi dan kemampuan kerja sapi (Kerketta et al., 2017), meningkatkan kesehatan ternak dan performa ternak (Tekeba et al., 2012;Li et al., 2014;Kerketta et al., 2017), dan mengurangi infeksi akibat cacing (Waruiru et al., 2003;Vatta et al., 2008) serta memberi keuntungan bagi peternak (Vatta et al., 2008;Tanwar et al., 2013;Suharyono et al., 2014). Perbedaan bahan dasar penyusunan UMMB menyebabkan perbedaan peningkatan bobot badan ternak (Manta et al., 2013). ...
... Nevertheless, the use of this alternative method shows greater effectivity when combined with other methods, such as anthelmintic use [201] or tannin-rich forages [202]. Even though the copper particles can be found in the abomasum of small ruminants for many weeks after administration, its anthelmintic effectivity may not persist for more than 41 days after administration [203]. Nevertheless, using this alternative method may result in increased copper concentrations in the livers of sheep and goats [204], and therefore low doses of 0.5 or 1 g per day are recommended and only under veterinary supervision [205]. ...
... There have been studies predicting body weight from various linear body traits in different goat breeds (Moaeen-ud-Din et al., 2006;Yakubu, 2009;Villiers et al., 2009;Khan et al., 2006;Alex et al., 2010;Chitra et al., 2012;Parés et al., 2012). Several statistical approaches i.e. correlation analysis for Beetal goats (Khan et al., 2006), simple, nonlinear, and multiple linear regression analysis for Malabari goats (Alex et al., 2010), joint use of Factor analysis and Principal Component Analysis (PCA) scores in multiple linear regression for commercial goats in Pakistan (Eyduran et al., 2013) canonical correlation analysis for German Farm × Hair Crossbred goats (Cankaya and Kayaalp, 2007) have been reported in the description of the relationship between the body weight and linear morphological traits for various goat breeds. ...
... Gastrointestinal nematode (GIN) infestations are among the important limiting factors to goat production (Calvete et al. 2014;Zvinorova et al. 2016;Mpofu et al. 2020). Haemonchus contortus is the major goat health challenge in developing countries (Vatta and Lindberg 2006;Spickett et al. 2012) and linked with great economic impact (Marume et al. 2011;Roeber et al. 2013). Infestation with GIN is highly associated with low productivity, reduced performance, • High prevalence of diseases and parasites are main constraints in communal goat productivity. ...
... Aqueous extract of leaves exert antidiabetic effects by inhibiting intestinal alpha-glucosidase ( Aguilar-Santamaría et al., 2009) and stimulating glucose uptake in adipocytes ( Alonso-Castro et al., 2010). CactaceaeCereus jamacaru DC.(Queen of the night) Anthelmintic in cows(Vatta et al., 2011). ...
... The use of copper oxide wire particles (COWPs) was found more successful in reducing nematodes, more precisely H. contortus [40,43]. Following administration of COWP, it enters the abomasum along with the ingesta and sticks to the mucosal folds [44]. In the acidic conditions of the abomasum, stuck elements take several weeks to dissolve, and free copper is released slowly, which augments the soluble copper concentrations. ...