Teka Feyera

Univeristy of New England

African trypanosomiasis is a major disease of economic and public health importance affecting agricultural and human development. The search for alternative compounds against African trypanosomiasis is justified by various limitations of existing chemotherapeutic agents. This study was aimed at screening the hydromethanolic and dichloromethane (DCM...

Background: Camel mange is an economically important parasitic disease affecting productivity in camel rearing areas of the world if appropriate treatment is not instituted. Methods: A cross-sectional and a controlled field trial were carried out to study the epidemiology of camel mange in Fafan zone, Eastern Ethiopia, and evaluate the efficacy...

Background: In Ethiopia, plant based remedies are still the most important and sometimes the only source of therapeutics in the management of livestock diseases. However, documentation of this indigenous knowledge of therapeutic system still remains at a minimum level. The aim of this study was, thus, to document the traditional knowledge of botani...

To investigate methods for in vitro assessment of anthelmintic efficacy against the chicken nematode Ascaridia galli this study firstly evaluated sample preparation methods including recovery of eggs from excreta using different flotation fluids and induced larval hatching by the deshelling-centrifugation method and the glass-bead method with or wi...

Evidence on the current efficacy status of anthelmintics used in the Australian poultry sector is lacking. A controlled trial was conducted to evaluate the efficacy of three commonly used anthelmintics, namely levamisole (LEV), piperazine (PIP) and fenbendazole (FBZ) plus levamisole-piperazine combination (LEV-PIP) against a field strain of A. gall...

The impact of a concentrate-rich (CR) diet on the gut microbiome and epithelium homeostasis is well documented. However, it has not been systematically studied whether and how host-microbial interaction contributes to the immune homeostasis in the rumen and colon of lambs fed alfalfa hay and wheat straw, alone or combined, in a CR diet. In all, 63...

Ticks are a common parasite that affect many animals by causing slowed growth, reduced milk output, and financial losses for industries that depend on animal hides and skins. From June to December 2017, participatory and conventional investigations on tick infestation in camels and cattle were conducted in Kebribayah and Afdem districts of Ethiopia...

Helminth infections have been re-emerging with the growing popularity of free-range and floor-based chicken production systems. The aim of this study was to determine the prevalence and worm burdens of intestinal helminth infection in cage-free laying chickens in Australia. In an online survey about worm prevalence, a high proportion of respondents...

Ascaridia galli infection models use eggs isolated from chicken excreta, worm uteri and worms cultured in artificial media. The aim of this study was to compare the infectivity of A. galli eggs isolated from these sources under two infection regimens. A 3×2 factorial arrangement was employed to test the infectivity of A. galli eggs from the three s...

Eggs are the infective stage of the chicken nematode Ascaridia galli and are often required for in vivo and in vitro studies on this parasite. The reliability of any artificial A. galli infection depends on the viability and embryonation capacity of A. galli eggs. The aim of this study was to determine ideal storage conditions for maximising the vi...

This study investigated worm control practices by free-range egg farmers and the efficacy of the commercial anthelmintics levamisole (LEV), piperazine (PIP), flubendazole (FLBZ) and fenbendazole (FBZ) against gastrointestinal nematodes on two free-range layer farms in Australia. An online survey comprising 36 questions was designed and implemented...

The efficacy of commercially available anthelmintics against mature and immature stages (including ovicidal effects) of two Australian field isolates of Ascaridia galli was evaluated in two separate experiments. The anthelmintics tested were levamisole (LEV), piperazine (PIP) and flubendazole (FBZ) plus LEV-PIP. A total of 192 artificially trickle-...

With the continued growth of free-range egg production, the importance of the chicken roundworm Ascaridia galli is increasing. Investigations into this parasite would be facilitated by the availability of characterised strains and clear guidelines on optimal methods of multiplication and maintenance. Currently, there is lack of well-defined in vivo...

Excreta egg counting techniques are used for indirectly estimating the magnitude of gastrointestinal nematode infection in live animals. The aim of this study was to optimise laboratory and field sampling methods for routine monitoring of nematode infections in chickens by evaluating the sensitivity, accuracy, and precision of the Modified McMaster...

Until recently, levamisole (LEV) and piperazine (PIP) were the only registered chemicals to treat nematode infections in chickens in Australia with no published appraisal of their efficacy status since registration. In 2020, Flubendazole (FLBZ) was registered while Fenbendazole (FBZ) has also been used off-label. The aim of this study was to invest...

Gastrointestinal helminth parasites are a concern for the poultry industry world-wide as they can affect the health, welfare, and production performance. A systematic review of the prevalence over time in different countries may improve our understanding of gastrointestinal helminthiasis in chickens and subsequently lead to improved poultry health....

Excreta egg counting techniques can provide valuable information for assessing flock infection levels, selecting nematode resistant chicken breeds and for determining anthelmintic efficacy. Although the Modified McMaster (MDM) method has been used for a long time, it is generally considered to have low sensitivity and precision (Das et al., 2020)....

With the growing popularity of free range production systems, the incidence of helminth infections has increased in commercial poultry farms in Australia. Adequate control can only be maintained by regular application of commercial anthelmintics. Until very recently, levamisole (LEV) and piperazine (PIP) were the only registered chemicals to treat...

Eggs oviposited by Ascaridia galli females in artificial media are commonly used as a source of infective material. We investigated the rate of egg production by cultured mature females (n=223), and changes in egg viability under different storage and incubation conditions. Eggs recovered after 1, 2 or 3 days of culture were subjected to either (1)...

A study was carried out to evaluate the acaricidal activities of crude methanolic extract of leaves of six medicinal plants, namely, Vernonia amygdalina, Calpurnia aurea, Schinus molle, Ricinus communis, Croton macrostachyus, and Nicotiana tabacum, against Rhipicephalus (Boophilus) decoloratus and Rhipicephalus pulchellus using an in vitro adult im...

Gastrointestinal nematodes (GINs) are the major limiting factor for the successfulness of livestock production throughout the world. Emergence of resistance strains as well as scarcity and high cost of the currently available drugs has led to the evaluation of other alternative helminth control options, mainly from plants. The current study is aime...

Gastrointestinal nematodes (GINs) are the major limiting factor for the successfulness of livestock production throughout the world. Emergence of resistance strains as well as scarcity and high cost of the currently available drugs has led to the evaluation of other alternative helminth control options, mainly from plants. The current study is aime...

Objective: This retrospective cohort study is aimed to assess reasons and predictors of regimen change from initial highly active antiretroviral therapy among 1533 Human Immunodefciency virus-infected adult patients at the Jimma University Tertiary Hospital. Results: One in two (47.7%) adults changed their antiretroviral therapy regimen. Patients w...

Background. External infections involving the skin and wound are the most frequent complications affecting humans and animals. Medicinal plants play great roles in the treatment of skin and wound infections. This study was aimed to evaluate the in vitro antibacterial activity of crude methanolic extracts of ninemedicinal plants. Methods.Agarwell di...

Background External infections involving the skin and wound are the most frequent complications affecting humans and animals. Medicinal plants play great roles in the treatment of skin and wound infections. This study was aimed to evaluate the in vitro antibacterial activity of crude methanolic extracts of nine medicinal plants. Methods Agar well...

Background. Haemonchus contortus, the causative agent of Haemonchosis, is the most economically important parasite in small ruminant production. Control with chemotherapy has not been successful due to rapid emergence of drug-resistant strains.There is a continuous search for alternative leads particularly from plants.The study aimed to evaluate th...

This research was carried out to investigate key physicochemical parameters of milk samples collected from camel, cow and goat in Jigjiga district, Eastern Ethiopia. Sixty fresh milk samples were collected purposively from camels, cows and goats (twenty samples from each species) and analyzed. The results revealed that, cow milk had 6.30 ± 0.15 pH,...

Plant derived bioactive molecules are always in demand and are the main focus of research. Despite the growing market demand for herbal medicines, safety of medicinal plants is still a concern. The present work aimed at generating preliminary phytochemical and biosafety information of crude methanolic and chloroform extracts of Cissus quadrangulari...

Dourine is a venereal transmitted trypanosomosis causing a major health problem threatening equines worldwide. The origin and identification of Trypanosoma equiperdum within the subgenus Trypanozoon is still a subject of debate. Unlike other trypanosomal infections, dourine is transmitted almost exclusively by coitus. Diagnosis of dourine has conti...

This descriptive cross-sectional survey examined faculty publication productivity at Jigjiga University, Ethiopia. It, specifically, aimed at exploring the factors and barriers that may influence publication productivity among academic staffs while also comparing variations across academic disciplines. The survey employed self-administered question...

Dourine is a venereal transmitted trypanosomosis causing a major health problem threatening equines worldwide. The origin and identification of Trypanosoma equiperdum within the subgenus Trypanozoon is still a subject of debate. Unlike other trypanosomal infections, dourine is transmitted almost exclusively by coitus. Diagnosis of dourine has conti...

Ectoparasites of the camel and their capacity to transmit diseases are important constraints to productivity and performance. A cross-sectional epidemiological study was conducted from November 2014 to April 2015 to determine the prevalence and risk factors associated with tick and mange infestation in dromedarii camels in three districts of Fafan...

Diets and nutrition have critical effect on immune status of human immunodeficiency virus infection and acquired immune deficiency syndrome (HIV/AIDS) patients and on recovery of immune competence after antiretroviral therapy (ART). A pilot study was conducted to explore associations between the dietary pattern of HIV/AIDS patients and their immune...

Plant products are a rich source of bioactive organic chemicals and offer an advantage over synthetic pesticides as these are less toxic, less prone to development of resistance and easily biodegradable. The present study aimed at screening the acaricidal potential of crude methanolic and aqueous extracts of Schinus molle (L.) leaves on the adult B...

A cross-sectional study was conducted in Kersa Woreda of the Oromia Regional State, Southwest Ethiopia, with the objective of characterizing the livestock production system and investigating the major livestock health problems in the studied area. A simple random sampling method was used to select 180 households for the study. A structured question...

Tick infestation is considered to be a major concern as ticks cause widespread distress, act as vectors of disease and affect the economic conditions of livestock-rearing. Although the use of chemicals is still the most effective method of tick control, uncontrolled applications may have accelerated the emergence of tick resistance to several activ...

A cross-sectional study was conducted from January to April 2014 to determine the major causes of carcass condemnation and rate of organs condemned in camels slaughtered at Akaki abattoir, Addis Ababa. For the study, meat inspection procedure involved both ante-mortem and post-mortem inspection was performed on a total of 385 camels and carcass. Up...

Abstract Post-mortem survey of fetal wastage was conducted on 227 ewes and 21 doe’s slaughtered at Asella abattoir between January and February 2015. Gestation stage was estimated from fetal Crown Rump Length (CRL) measurement. Pregnancy was detected in 74.4% ewes and 47.6% doe’s (p=0.009), giving an overall fetal wastage rate of 72.2%. Of these, 3...

Cross-sectional study was conducted on microbiological quality of raw milk obtained from selected dairy farms in Dire Dawa city, Ethiopia from November 2013 to April 2014. In the study, a total of 60 raw milk samples was collected from four dairy farms; three large scales and one small scale. For this purpose, milk samples were collected from milk...

Most tropical feed resources particularly crop residues and hay are mostly deficient in protein content. Thus, maximization of livestock productivity in the tropical regions largely depends on the efficiency of utilization of locally available protein sources. This study was aimed to evaluate the effect of supplementation of dried tomato pomace, co...

Analysis of 13 published anthelmintic sensitivity studies against gastro-intestinal (GI) nematodes of small ruminants was conducted to describe anthelmintic use trends and resistance problems in Ethiopia. Anthelmentic use surveys in 5 small ruminant rearing areas indicated widespread risky practices including; marketing of unknown formulation drugs...

A cross-sectional study was done with the objectives to assess welfare issues and associated risk factors compromising welfare of working donkeys in Wolaita Soddo Zuria district. A total of 335 working donkey and 100 donkey owner/user purposely selected from five peasant associations. Both direct (animal based) and owner interview were used to coll...

A cross-sectional study was conducted from November 2011 to April 2012 with the objective of assessing the causes, welfare problems and management practices in 110 mules and 140 donkeys in and around Bahir Dar, Northwest of Ethiopia. In the study subjects, 140 donkeys and 110 mules that had visible external injuries were examined using detailed acc...

Abstract: A cross-sectional study was undertaken to determine the seroprevalence of bovine brucellosis in 300 dairy cows and to assess risk factors that could facilitate the transmission of the disease in Debre-Zeit, Central Ethiopia using questionnaire survey, Rose Bengal Plate Test (RBPT) and Complement Fixation Test. Potential risk factors for s...

Abstract: A combination of cross-sectional study and controlled field trial was conducted from July 2012 to December 2013 with the objective of determining the epidemiology of gastrointestinal parasites and evaluating the anthelmintic efficacy of albendazole, ivermectin and tetramisolein sheep in Jigjiga district and its surroundings, Somali Region...

A study, that comprised of cross sectional study and controlled field trial, was conducted from December 2013 to April 2014 with the objective of estimating the prevalence of gastrointestinal parasites in randomly selected 384 camels (Camelus dromedaries) and testing the efficacy of three anthelmintics, namely ivermectin, albendazole and levamizole...

Background: African trypanosomiasis is a major disease of economic and public health importance affecting agricultural and human develop- ment. The search for alternative compounds against African trypanoso- miasis is justified by various limitations of existing chemotherapeutic agents. This study was aimed at screening the hydromethanolic and di-...

Antiplasmodial activity of the 80% methanolic extract of Artemisia abyssinica (A. abyssinica) aerial part against chloroquine sensitive Plasmodium berghei (P. berghei) in mice using the four day suppression test was conducted. A total of thirty mice assigned to 5 groups of 6 animals each were infected with chloroquine sensitive P. berghei (1x107 pa...

The study was conducted to physically characterize indigenous sheep types in Selale area, Debre Libanos and Wuchale districts, Central Ethiopia. A total of 560 mature sheep were sampled randomly for characterization of phenotypic traits. Majority of the ewes and rams in both districts had plain coat color pattern (58.21%) followed by patchy (33.33%...

The study was undertaken to evaluate antirabies activity of hydroethanolic extract of roots and leaves of Phytolacca dodecandra (L’ Herit) (Phytolaccaceae), one of the widely used plants for traditional treatment of rabies in humans and animals in Ethiopia, by using mice model. The antirabies activity of both parts of plant extract in the doses of...

Abstract: A cross-sectional study on prevalence and antibiotic susceptibility of E. coli isolated from raw meat samples of cattle origin was conducted in Dire Dawa city, Ethiopia, from November 2012 to April 2013. A total of 384 meat samples collected from two abattoirs were cultured for detection of E. coli which was then tested for antimicrobial...

Abstract: A cross-sectional study was conducted from October 2011 to March 2012 on 410 randomly selected small ruminants (255 sheep and 155 goats) in Gechi district, Southwestern Ethiopia, with the objectives of determining the prevalence of gastrointestinal (GI) parasites and assessing the potential risk factors. The overall prevalence of gastroin...

African trypanosomiasis is a major public health problem having serious economic implications affecting both human and agricultural development. The present work dealt with phytochemical screening and in vitro antitrypanosomal activity testing of the hydromethanolic and dichloromethane (DCM) extracts of the aerial parts of Artemisia abyssinica Sch....