Systematic Review on Herbal Plants Having Veterinary Ectoparasitic Importance in Ethiopia

Review Article

Austin J Vet Sci & Anim Husb. 2023; 10(5): 1132.

Systematic Review on Herbal Plants Having Veterinary Ectoparasitic Importance in Ethiopia

Efeson Yasin Biramo¹; Natinael Dawit Kalacho²*; Akeko Abriham Abota³

¹Department Livestock and Fishery, Damot Sore district, Wolaita Ethiopia

²Jinka University, School of Veterinary Medicine, Jinka Ethiopia

³Department Offa District Livestock and Fishery, Wolaita Ethiopia

*Corresponding author: Natinael Dawit Kalacho Jinka University, School of Veterinary Medicine, Jinka Ethiopia. Email: [email protected]

Received: October 10, 2023 Accepted: November 14, 2023 Published: November 21, 2023

Abstract

Parasitic skin disease in domestic ruminants caused by ticks, lice, fleas, and ticks is one of the serious diseases causing great economic losses to smallholder farmers, the industry tanning and the country in general. Invasion of ectoparasites causes blood loss, irritation leading to skin degeneration and rejection, poor growth, reduced production, reproduction and death. Although ruminant parasites can be controlled using commercial synthetic insecticides, their accessibility and affordability to poor farmers, the development of Their resistance status and profound environmental impact make them less desirable than other alternatives such as medicinal plants. Therefore, there is an urgent need to design an activity to evaluate the mite-killing efficacy of medicinal plants traditionally used against parasitic skin diseases in ruminants and domestic chickens in Ethiopia. The study was conducted from October 2020 to January 2021 using the different search engines. For this study, various ethno botanical and ethno medical survey reports on the ectoparasitic importance of medicinal plants, in veterinary practice conducted in Ethiopia were used. Out of a total of 102 studies, 20 were used in a systematic review. Descriptive statistics were used to analyze data collected. Among the parts of ectoparasitic plants, the leaves are the most frequently used. Sharpening and grinding are the main processing methods for preparation. Phytochemicals were not detected during the search. Therefore, further studies are needed to determine the dosage, concentration of the preparation, side effects and phytochemicals present in medicinal plants.

Keywords: Ectoparasites; Acaricides; Efficacy; Green pharmaceutics; Medicinal plants

Abbrevations: CSA: Central Statistics Authority; EVM: EthnoVeternary Medicine; SNNPRS: South Nation Nationality and People Regional State; WHO: World Health Organization

Introduction

Livestock plays an important role in the livelihoods of 70% of the world's resource-poor population, most of who live in rural areas [9]. In Ethiopia, the livestock industry is fundamental to the country's economic development. Livestock production is estimated at 52.13 million cattle, 24.2 million sheep, 22.6 million goats, 44.89 million poultry, 8.73 million horses and 0.99 million camels. CSA, 2012). Small ruminants make up about 30% of the country's total livestock herd and account for 46% of national meat production, 14% of dairy consumption, and 58% of hides production [35]. Animal diseases and poor management practices are major threats to the sustainable livelihoods of resource-poor rural communities [6]. External parasites such as scabies mites, lice, mites and ticks cause serious economic losses to smallholder farmers, the tanning industry and the country in general. They cause intense irritation leading to poor condition, weight loss, reduced milk production or damage to the skin or wool of the sheep and can lead to death. In addition, they are responsible for transmitting diseases to animals or are vectors of disease transmission to many people [52]. In cattle, the parasites cause skin irritation when they suck or feed on epithelial debris and secretions. Scratching and rubbing destroys their fur and damages their skin, and reduces their feeding time. Thumb sucking can cause animals to become anemic and inefficient. Especially malnourished cattle, young calves and calves are the worst affected. Heavy suction parasitic infections can also lead to lameness [53]. Damage caused by the parasite can be mechanical, but the situation is also complicated by the host's response to the presence of the specific parasite, its secretions and excretions [33]. To some extent, the impact of ectoparasites in livestock and the diseases they transmit has been underestimated in the past compared to the impact of major pests such as the rinderpest, and even than the effects of endoparasitic species, as these tend to be more economically important in temperate regions [34].

Traditional medicine is a comprehensive interdisciplinary study of the local knowledge, socio-cultural and environmental structures associated with animal health care and breeding. So to keep animals healthy, traditional healing methods have been practiced for centuries and passed down orally from generation to generation [35]. Herbal medicine has become more popular in the treatment of many diseases because it is believed that green medicine is safe, readily available and has fewer side effects. Like other forms of traditional knowledge, ethnoveterinary knowledge about medicinal plants is not compiled. It is simply passed down orally from generation to generation and is therefore at risk of extinction as the elderly die and the younger generation loses interest in the traditional way of life [42].

In Africa, up to 80% of the population uses traditional medicine for primary health care and more than a third of the population in developing countries do not have access to essential medicines. In Ethiopia about 80% of the population depends on traditional medicine for health care [27]. Lack of veterinary specialists, scarce and irregular supply of veterinary drugs, high cost of equipment and drugs, lack of government veterinary policy, presence of veterinary policy. Counterproductive practices and poor infrastructure are mentioned as some of the main factors leading to farmers in developing countries relying more on ethno botanical medicine than on the current health system [10].

The use of synthetic pesticides in the management or treatment of parasites is becoming a serious global problem due to the development of resistance, non-specific residue products and environmental pollution. The growing concern about environmental pollution due to chemical waste from some synthetic pesticides has paved the way for a “green pharmaceutical” [4]. Researchers are now increasingly cautious about the use of synthetic pesticides and are making considerable efforts to design environmentally friendly research processes to develop safe drugs. Therefore, there is an urgent need for effective chemical control agents that can be used safely to treat animals and humans [42].

The prevalence of parasitic infections varies depending on various factors. In Ethiopia, the reported prevalence of ectopic parasites has ranged from 13.8% to 68.69% in sheep and 7.80% to 58% in goats, respectively [29,31,52]. Furthermore, most modern medicines are expensive and inaccessible to the majority of farmers and ranchers in Ethiopia. Most of them rely on traditional knowledge and locally available materials (mostly botanicals) to control disease in livestock [45]. However, this approach does not work in developing countries. EVP, adopted since ancient times by rural people in many indigenous communities, has been successful in controlling many human and animal diseases, including tick infestations [39].

However, the country's ethno-veterinary practice is affected by acculturation and plant decline due to environmental degradation, deforestation and over-exploitation of medicinal plants [49]. The main variable factors affecting the distribution of plant parasites are agroecology, age, sex, and livestock management/handling. High temperature, humidity and sunlight create conditions for lice to enter. Poor management, nutrition and hygiene conditions as well as poor farmer awareness of the effects of parasites are thought to contribute to the widespread occurrence of infection (Pangui et al., 1994). However, to date, very little ethno-veterinary knowledge in Ethiopia regarding the use of medicinal plants has been properly documented and analyzed. Knowledge on the use of ethno-veterinary drugs is transmitted orally and is at risk of being lost due to technical, socio-economic changes.

• Therefore, the objectives of this study were:Overview of traditional medicinal plants in the treatment of ectoparasites in animals.

• Profile and transfer identified plants to the next generation.

• Record the parts of the plant used for medicinal purposes and the method of preparation

Literature Review

Overview of Traditional Medicinal Plants for Animals

Ethnobotany is a branch of science that studies the knowledge, methods, skills and practices traditionally used to treat various diseases in animals [24]. According to the World Health Organization (WHO), a medicinal plant is any plant which in one or more of its organs contains substances that can be used for medicinal purposes or are precursors of semi-synthetic processes. Such plants shall have parts, including leaves, roots, rhizomes, stems, bark, flowers, fruits, seeds or seeds, which are used to control or treat disease and will therefore contain medically active chemical fraction. These non-nutritive phytochemicals or bioactive components are often referred to as phytochemicals or phytonutrients and are responsible for the defense of plants against bacterial infections or pests [8]. Ethno-Veterinary Medicine (EVM) is important in Africa and other developing countries because the majority of herders are small-scale farmers and most of them live in rural areas where cultural practices are common (Madge, 1998). In traditional practice, plant extracts are developed by farmers rather than scientists due to lack of funds to purchase synthetic pesticides, forcing them to depend on pest control methods [22].

In traditional veterinary practice, among different plants used in traditional medicinal practice, crushed leaves of the plant Calpurnia Aurea and chopped Dodonea Angustifolia leaves, mixed with water and filtered to treat residual fetal membranes, are used to treat mastitis, dermatophytosis, and dermatophytosis and ectopic parasites [11,46]. The leaf powder of Azardrachta Africana is crushed and mixed with indica water applied topically to treat parasites [14].

Management of Skin Diseases in Animals with Conventional Medicine

Parasitic skin diseases in animals can be prevented and controlled by various synthetic antiparasitic drugs that affect the nervous system of the parasites. Although currently available parasite-killing compounds are classified into different categories based on their chemical structure, most of them have limitations when it comes to targeting the nervous system [8]. Therefore, it is important to look for other drugs with different mechanisms of action. In addition, conventional drugs currently on the market have a number of disadvantages, including an increase in drug resistance and concerns about human and environmental safety. These issues have prompted researchers to seek to develop safe alternative antiparasitic compounds with variable targets of action [44]. Traditional medicine can be used as an alternative to overcome this problem.

The Role of Herbal Medicine in Management of Ectoparasitic Skin Disease of Animals

Traditional medicine has been used in the management of various livestock diseases around the world, especially in developing countries. The use of medicinal plants by traditional medicine practitioners in developing countries has increased. Developed countries are also showing increasing interest in and use of herbal medicines due to public dissatisfaction with the cost of prescription drugs and an interest in reverting to natural remedies. In addition, in Africa, access to insecticides is limited due to unstable economic conditions, leading to higher prices for imported products. In addition, improper use of tick-killers by untrained or unauthorized persons facilitates the development of resistance [17]. If only synthetic pesticides are used, there is a risk of losing the traditional knowledge of using native plants. Although several experimental trials involving in vitro and in vivo studies have been documented on the importance of herbal medicines for the treatment of parasitic skin diseases in animals, this review summarizes only the drugs commonly used by herbalists.

Medicinal Plants Used for the Treatment of Ectoparasite

(Table 1)