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Zooprophylaxis as a control strategy for malaria caused by the vector Anopheles arabiensis (Diptera: Culicidae): a systematic review



Zooprophylaxis is the use of wild or domestic animals, which are not the reservoir host of a given disease, to divert the blood-seeking malaria vectors from human hosts. In this paper, we systematically reviewed zooprophylaxis to assess its efficacy as a malaria control strategy and to evaluate the possible methods of its application.


The electronic databases, PubMed Central®, Web of Science, Science direct, and African Journals Online were searched using the key terms: “zooprophylaxis” or “cattle and malaria”, and reports published between January 1995 and March 2016 were considered. Thirty-four reports on zooprophylaxis were retained for the systematic review.


It was determined that Anopheles arabiensis is an opportunistic feeder. It has a strong preference for cattle odour when compared to human odour, but feeds on both hosts. Its feeding behaviour depends on the available hosts, varying from endophilic and endophagic to exophilic and exophagic. There are three essential factors for zooprophylaxis to be effective in practice: a zoophilic and exophilic vector, habitat separation between human and host animal quarters, and augmenting zooprophylaxis with insecticide treatment of animals or co-intervention of long-lasting insecticide-treated nets and/or indoor residual spraying. Passive zooprophylaxis can be applied only in malaria vector control if cattle and human dwellings are separated in order to avoid the problem of zoopotentiation.


The outcomes of using zooprophylaxis as a malaria control strategy varied across locations. It is therefore advised to conduct a site-specific evaluation of its effectiveness in vector control before implementing zooprophylaxis as the behaviour of Anopheles arabiensis mosquitoes varies across localities and circumstances.

Multilingual abstract

Please see Additional file 1 for translations of the abstract into the six official working languages of the United Nations.


Humans have known malaria for thousands of years. According to the World Malaria Report 2016 [1, 2], there were an estimated 212 million cases and 429,000 deaths due to malaria in 2015, approximately 88% of which were in the African region. Similarly, most of the deaths (90%) also occurred in the World Health Organization (WHO) African Region; of these approximately 74% were children under 5 years of age. The incidence and death of malaria, however, was reduced by 21% and 29%, respectively, in 2015 worldwide in comparison to the situation in 2010 [1, 2].

Africa is the most affected region due to a combination of factors including the presence of very efficient malaria vectors (Anopheles gambiae sensu lato and An. funestus) and the predominant parasite species Plasmodium falciparum, which is the species mostly responsible for severe malaria [2]. Weather conditions, which often allow transmission to occur year round, scarce resources, and socioeconomic instability, which has hindered efficient malaria control activities, have also led to a high malaria incidence in this region [1, 2].

Malaria parasites are one of the first pathogens to be studied in a public health context due to the high level of morbidity and mortality in humans. There are four known species of Plasmodium, which cause human malaria, with a fifth added to the list most recently from the forested regions of Southeast Asia. These are: P. falciparum, P. vivax, P. malariae, P. ovale, and P. knowlesi [3, 4]. Plasmodium falciparum is the most virulent member of the group and it is responsible for the majority (99%) of malaria-related mortality [1, 3, 5]. The different Plasmodium species are host-specific though there have been periodic reports of simian malaria parasites being found in humans [4, 5].

The disease spreads from one person to another via the bite of a female mosquito of the genus Anopheles [5]. Anopheles mosquitoes belong to the order Diptera, family Culicidae, genus Anopheles, and series Pyretophorus. There are 465 to 474 described Anopheles species with 70 of its members recognized to transmit the Plasmodium parasite to humans [6]. Some of the species are species complexes because of the presence of morphologically indistinguishable sibling species within the complex [6]. For instance, the An. gambiae complex is a species complex composed of sibling species that are all difficult to identify morphologically using a taxonomic key but can be identified into its eight member species, namely An. arabiensis, An. gambiae, An. coluzzii, An. merus, An. melas, An. bwambae, An. quadriannulatus, and An. amharicus, using molecular techniques [7,8,9].

Anopheles arabiensis, the subject of this review, is mainly found in subtropical and tropical savannah regions on the African continent. Its population distribution ranges from the western coast of Africa above the equator, to farther north into the Sahel, to the southwestern corner of the Arabian Peninsula, Sudan, Ethiopia, Kenya, Somalia, along the east coast, including Madagascar, and south into the desert and steppe environments of Namibia and Botswana in Southern Africa [6]. The adult An. arabiensis is well adapted to dry and forest sparse environments [10], whereas its immature stage prefers short-lived, sunlit, clear, and shallow aquatic breeding habitats mainly created by rainfall and human activities [11]. The density of larvae increases as the rainy season progresses. The abundance and development of the larvae is dependent on different physicochemical and biological factors [11], water turbidity and algae [12, 13], the presence of ammonium sulfate fertilizers [14], thermal limit [15], and the presence of maize pollen [16, 17].

In the eastern and southeastern African region where An. arabiensis remains the primary malaria vector, its population dynamics vary according to season, with its maximum population density recorded in the long rainy season from June to August [18]. It survives extreme dry seasons in the form of embryo dormancy in moist soil [19], continues reproduction using artificial breeding pans, and its population quickly builds up the following rainy season due to temporary breeding habitats being established [20].

The resting behaviour of An. arabiensis depends on whether its host resides indoors or outdoors. In areas where hosts mainly stay indoors, An. arabiensis exhibits an endophilic (indoor resting) behavioural pattern [21], whereas in areas where hosts are mainly outdoors, An. arabiensis exhibits both outdoor and indoor resting habits [22, 23]. The exophilic behaviour of An. arabiensis is also often observed following interventions such as the application of indoor residual spraying (IRS) and/or long-lasting insecticide-treated nets (LLINs) [24, 25]. A shift from endophilic behaviour to exophilic behaviour is not only seen in An. arabiensis but in all other malaria vector species and it is attributed to the deterrence and/or contact irritancy due to indoor malaria vector control interventions (IRS and LLINs) [25,26,27,28].

The feeding and host preference behavior of An. arabiensis varies considerably from place to place. Evaluation of the human blood index (HBI) of An. arabiensis in Ethiopia and elsewhere in Africa showed both zoophagic and anthropophagic behaviour. Fornadel et al. [29] and Tirados et al. [30] documented highly anthropophilic behavioural patterns of populations of An. arabiensis from Zambia and Southern Ethiopia, respectively. Similar feeding patterns of preferring humans to other non-vertebrate hosts was observed in Senegal, in a blood meal analysis of populations of An. gambiae and An. arabiensis [31]. Exclusive zoophilic behaviour of An. arabiensis was reported in Madagascar [32], whereas most studies on populations of An. arabiensis from other countries documented an opportunistic feeding behaviour [33,34,35,36,37].

The time of host feeding varies depending on the host preference and on whether the host stays mainly indoors or outdoors. In an assessment of hourly person-biting rates of An. gambiae s.l. conducted in Miwani, Kenya, a region where An. gambiae (54%) and An. arabiensis (45%) exist in sympatry, the majority (83%) of female mosquitoes were found to be biting between 01:00 and 06:00, with a peak indoor biting at 06:00, while the peak outdoor activity occurred between 02:00 and 04:00 [38]. In Ahero village, where An. funestus comprised a large proportion of mosquitoes caught indoors (67.3%), the main indoor biting peak for An. arabiensis occurred at 03:00, while the outdoor biting activity peaked between 03:00 and 06:00. The same study concluded that An. arabiensis mosquitoes were 1.9 times more likely to bite indoors than outdoors, and that these mosquitoes had very low preference for human blood meals as compared to An. gambiae. Taye et al. [39] reported that An. arabiensis in Southern Ethiopia bites during the entire night with a peak between 23:00 and 03:00. A recent study by Yohannes and Boelee [40] conducted in Northern Ethiopia showed that An. arabiensis has more early biting activities, with 70% of the biting activity occurring before 22:00, with a peak between 19:00 and 20:00, which is similar to a study conducted by Kibret et al. [41] in Central Ethiopia.

A difference in the time of biting and rhythm seems to be affected by parity, with a larger proportion of possibly disease-transmitting parous mosquitoes being active in the later part of the night, mainly when humans sleep [39, 42]. Seasonality can also influence the biting activity of populations of An. arabiensis. Taye et al. [39] documented that the biting rate of An. arabiensis in August and April were 19.3 bites/person/night and 82 bites/person/night, respectively, which is a considerable difference.

Important malaria vectors are not uniformly distributed within a country with their range typically crossing national borders. The occurrence of Anopheles species varies according to macro- and micro-environmental differences exhibited by different bioecological areas. Therefore, entomological studies should incorporate a detailed distribution of the vector species, as it is the basis for risk assessment of malaria transmission [43, 44]. Thus, the abundance of anophelines is one entomological parameter used to describe the relationship between vectors and the incidence of malaria [45].

One of the keystones in malaria control strategy is tackling the vector, either by reducing the vector density or infectivity rate of the vector (i.e., the proportion of sporozoite positive mosquitoes compared to the total dissected mosquitoes), which will have an impact on malaria transmission and incidence. Based on previous research reports, it appears that the vector mosquito population of Ethiopia has developed resistance against most insecticides (dichloro- diethyl-trichloroethane, permethrin, deltamethrin, and malathion) [46]. The emergence and spread of insecticide resistance in some regions may suggest that other vector control tools may be needed to sustain control and mitigate the risk of malaria infection, despite the success of existing vector control intervention strategies, such as LLINs and IRS [46]. Consequently, new attention has been given to environmental management, biological control, and zooprophylaxis [47].

In malaria vector control, zooprophylaxis can be applied separately or in combination with other vector control tools. Application of zooprophylaxis is the use of wild or domestic animals, which are not the reservoir host of a given disease, to divert the blood-seeking malaria vectors away from the human host of that disease. Use of zooprophylaxis as a malaria vector control tool can be in an active, passive, or integrated form combined with chemical insecticides used in public health [47, 48].

Research assessing the effectiveness of zooprophylaxis has been done in various countries. In this paper, a qualitative systematic review using Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines was conducted with the aim of exploring the contribution of zooprophylaxis in the fight against malaria incidence and prevalence. Therefore, we explored entomological studies of which their outcomes either favorable or non-favorable in terms of application of zooprophylaxis. Meta-analysis was not possible due to the lack of common study outcomes in the retrieved articles.


Identification of papers and eligibility criteria

The databases PubMed Central®, Web of Science, ScienceDirect, and African Journals Online were searched between December 2015 and March 2016. The published reports used in this review were retrieved from searches using the following key terms: “zooprophylaxis” or “cattle and malaria”, “malaria vector control”, and “host preference”. In cases where the key terms could not produce enough relevant information, references from related articles were copied and pasted in Google Scholar to get the full PDFs of the target articles. Review articles on zooprophylaxis were excluded from the synthesis but their content was assessed in order to weigh up their objective, their relevance and relatedness to our review, and their inclusiveness of contemporary information. Abstracts were selected if they were found to include information on zooprophylaxis, malaria control strategies, or on the behaviour of malaria vectors and their host preference. Irretrievable full text articles as well as non-English abstracts were excluded.

The selected articles were screened as follows: First, all abstracts not related to Anopheles biology, ecology, resting, feeding behaviour, feeding pattern, host preference, zooprophylaxis, or the diversion of mosquitoes to hosts other than humans were excluded. Second, duplicate and non-malaria related articles were also not considered. Bulletin news articles and articles reviewing the effects of zooprophylaxis discussed in other reviews were also excluded (see Fig. 1).

Fig. 1
figure 1

Systematic article selection

Data extraction from each article included author, date of publication, study location, mosquito species, study aim, study design, and study outcomes. Published research works reporting a significant association between the presence of livestock and reduced malaria infection were considered as supporting zooprophylaxis, and studies that either reported failure of zooprophylaxis or a poor association between zooprophylaxis and reduced malaria infection were considered as studies that disprove the effect of zooprophylaxis in malaria vector control.


Study characteristics

Thirty-four articles were included in this review. Of these, 26 (76%) articles show that zooprophylaxis is either effective in malaria vector control, increases the incidence of malaria, or has no effect at all in malaria control. The methodologies of these articles (study aim, design, and sample size) are shown in Table 1.

Table 1 Summary of methodological overview (study aim, design, and sample size) of 26 studies showing that zooprophylaxis either has a positive, negative, or no effect in malaria control

Thirteen (38%) articles show that zooprophylaxis is effective in malaria vector control. Of these, three research works were conducted in Asia (1 from Indonesia, and 2 from Pakistan), and the remaining ten were reported from Africa (nine from east Africa and one from southern Africa). Regarding the study design, there was one case-control, one laboratory-based and field-based bioassays, one contact bioassay and field experimental hut trial, one human landing catch (HLC) and parasitological survey, one randomized controlled trial, one cross-sectional, and seven experimental studies (see Tables 1 and 2).

Table 2 Summary of 26 studies showing outcome parameters and whether zooprophylaxis is effective or not in malaria control

Another thirteen (38%) studies show that zooprophylaxis either increases the incidence of malaria or has no effect at all on malaria transmission. Of these, two research works were conducted in Asia (Pakistan), and the remaining 11 were reported from Africa (three from western Africa and eight from eastern Africa). Regarding the study design, there were three field experimental studies, one paired cohort study, two case-control studies, two longitudinal studies and the rest five were cross-sectional surveys (see Tables 1 and 2).

Eight (24%) articles are modelling studies that report the role of zooprophylaxis in malaria vector control (see Table 3).

Table 3 Summary of eight modeling studies that report on zooprophylaxis as a malaria vector control tool

Outcome parameters measured

Ten studies measure parasitaemia and/or vector abundance. Eleven studies measure mosquito abundance, HBI, and/or the sporozoite rate. Four studies measure mosquito mortality and knockdown. Two studies measure mosquito biting behaviour and human landing catch. Finally, one study uses physiological status and mosquito mortality as a response variable (see Tables 1 and 2).

The role of zooprophylaxis in malaria control

The role of domestic animals, particularly cattle, in reducing malaria incidence differs with the zooprophylaxis type, which can be categorized as passive, active, combination, or insecticide zooprophylaxis.

Passive zooprophylaxis is the natural prophylactic effect of cattle that is seen when cattle density within a community is increased. Its effect can be studied by evaluating the association between domestic animal ownership and parasitaemia [49,50,51], or mosquito blood meal source, mosquito infectivity [30, 50, 52, 53] or mosquito density [35, 54, 55].

Active zooprophylaxis refers to the deliberate introduction of domestic animals in order to divert mosquitoes away from human settlements towards other non-transmitting hosts. Active zooprophylaxis is studied by evaluating the association between malaria prevalence and cattle ownership using paired cohort studies of people living with cattle placed at close proximity and people living with cattle placed at a distance [56, 57].

Combination zooprophylaxis refers to the use of insecticide treated nets (ITNs) and IRS being integrated with livestock placed in a separate shed in order to induce a push-pull effect, thereby aiming to reduce the risk of disease incidence. The deliberate introduction of LLINs and IRS is used as the pushing factor, whereas domestic animals placed strategically is used as the pulling factor. Zoophilic and opportunistic mosquitoes such as An. arabiensis are attracted by domestic animals, particularly cattle (i.e. pulling effect), and the chemicals used in the impregnation of bed nets and IRS are capable of inducing repellence of the vector before it comes into contact with the human host. The effect is studied by evaluating the association between ITN ownership, IRS coverage, livestock ownership, and malaria prevalence [50, 53].

Insecticide zooprophylaxis is the treatment of cattle by sponging or dipping the cattle with insecticides in order to pass on a lethal dose of insecticides to the blood-feeding mosquitoes. This effect can be studied by evaluating the difference in mosquito mortality and density, and malaria incidence in households with both treated and untreated domestic animals [56, 58,59,60,61,62,63].

The studies examined in this scoping review found that zooprophylaxis can have a positive, negative, or no effect in malaria vector control. In terms of the negative effect, pig and donkey keeping was reported to be a risk factor for malaria transmission in Mozambique [64], Guinea Bissau [65], and Burkina Faso [51]. Similarly, Bouma and Rowland [66] noticed an increased Plasmodium prevalence in children in Pakistan living in households with cattle, and Githinji et al. [67] concluded that the presence of cattle and long grass in homesteads results in a 1.81 higher risk for malaria infection in Kenya. Similarly, in studying the risk factors associated with malaria incidence, it was concluded that humans sleeping in the house with animals have a significantly higher risk of contracting malaria in Ethiopia [68, 69].

Several research outputs on the other hand, either lack strong conclusion with reference to the role of zooprophylaxis or the reduction in the risk of malaria infection has been attributed to other confounding factors. For instance, research conducted in the Gambia by Bøgh et al. [56, 57] suggested reduced HBI and CSP rate for mosquitoes collected from households living with cattle as compared to those mosquitoes from households without cattle. However, there was no significant difference between the groups in the HBI and CSP rates neither of An. gambiae s.l. nor in the estimated malaria transmission risk. Furthermore, the decrease in parasitaemia, in households living with cattle could be attributed to the fact that cattle owners were wealthier than non-cattle owners were, therefore less risk of malaria infection could be associated with improved life standard of cattle owners.

Tirados et al. [30] conducted an entomological study on An. arabiensis and An. pharoensis mosquitoes in Arba Minch, Southwestern Ethiopia in order to determine the host preference, resting behaviour of the vector population, and protective value of cattle against malaria. They concluded that cattle have a protective value against An. pharoensis (secondary vector) both indoors and outdoors. An. arabiensis (major vector) mosquitoes from this area, however, remain anthropophagic, exophagic, and exophilic, and can sufficiently feed on humans to transmit the disease. Therefore, humans staying indoors are only mildly protected if cattle are outdoors. Habtewold et al. [63] also assessed the effectiveness of deltamethrin-treated zebu and the related behavioural avoidance of An. arabiensis in the same region, and concluded that cattle have a protective value against An. pharoensis. However, no zooprophylactic effect was observed by placing zebu cattle near humans for An. arabiensis.

A number of reports and modelling studies argue that zooprophylaxis is effective under specific circumstances. According to Tirados et al. [70], zooprophylaxis is only effective for An. arabiensis when humans are indoors and cattle are outdoors. The human biting rate (HBR) was reported to be highest in mixed dwellings and lowest when cattle are kept separately both in Ethiopia [71] and Zambia [49]. This is also supported by modelling studies conduced by Hassanali et al. [72], Kawaguchi et al. [73], and Saul [74], who argue that separating the habitats of cattle and humans is necessary for the success of zooprophylaxis. This is due to the fact that the presence of cattle may decrease malaria transmission to humans but increase the mosquito survival rate. In addition to habitat separation, the animal population should increase above a threshold value, which results in the diversion of mosquitoes being a more effective malaria control strategy than decreasing the mosquito population [75, 76].

Reports confirming the effectiveness of zooprophylaxis are from African and Asian countries. Six studies are field experiments on insecticide zooprophylaxis. Regarding the successfully used treatments on cattle, these include fungus (bioinsecticide zooprophylaxis) [58], ivermectin [59, 61], deltamethrin [55, 60, 62], permethrin, and lambda cyhalothrin [62]. It was found that fungal, ivermectin, and deltamethrin-treated animals significantly reduce survival rates of malaria vectors, as well as fecundity. Residual effects are longest in deltamethrin-treated cattle. Studies on passive zooprophylaxis are mainly population-based case control studies and surveys. In these studies, different household risks for the transmission of malaria were evaluated. The combination effect of ITNs, IRS, and livestock was also assessed [50, 53, 73, 77, 78].

Deressa et al. [68], Kaburi et al. [53], and Iwashita et al. [50] collected mosquitoes from households, made inventories of livestock, and assessed the presence or absence of LLINs in Kenyan households. They found that both the person-biting rate and the HBI of An. arabiensis decrease with an increase in the number of cattle in households with LLINs, demonstrating the additive role of LLINs in zooprophylaxis. This is also supported by modeling studies conducted by Levens [77], and Killeen and Smith [78], who argue that scaling up mass coverage of LLINs to 80% in the community and ensuring a 80% coverage of livestock treatment with pyrethroids could lead to a global reduction and elimination of the disease.

The separation of human shelters and animal sheds at a certain distance [50,51,52,53,54,55,56,57, 66, 69] can be combined with the use of LLINs and IRS [50, 53], and the treatment of domestic animals with appropriate insecticides [55, 58,59,60,61,62,63]. The type of mosquito species and its feeding and resting behavior affect the efficacy of zooprophylaxis. Thus, ownership of domestic animals in the presence of anthropophilic vectors such as An. gambiae and An. funestus may lead to an increased risk of malaria incidence. In contrast, ownership of domestic animals may lead to a lower risk of malaria incidence in areas where zoophilic and/or opportunistic vector species such as An. arabiensis and An. pharoensis predominate [30, 50, 57, 63].


Malaria remains a major public health burden in Sub-Saharan Africa and continually finding effective control strategies is of great importance. For zooprophylaxis to be an effective control strategy, several conditions are required. A zoophilic and exophilic vector is the most essential component for zooprophylaxis to be effective. Habitat separation between human and host animal quarters is the second most important condition. Third, zooprophylaxis can be augmented through insecticide treatment of the animal and co-intervention with LLINs and/or IRS.

The main vectors identified that can successfully be controlled with zooprophylaxis were An. arabiensis and An. pharoensis in Africa [49, 52, 53, 55, 70, 71], and An. stephensi, An. culicifacies, An. sinensis, and An. farauti in Asia [60,61,62, 76].

Anopheles arabiensis is one of the main vectors of malaria in Sub-Saharan Africa. It is known mostly for zoophilic [32, 36, 52, 53, 55], opportunistic [35, 79], and occasionally anthropophilic behaviour [29, 30, 80]. Thus, the behaviour of An. arabiensis can be varied depending on the location of the host (indoor versus outdoor) and local genotype of vector population, with the West African population mostly identified as anthropophilic and the eastern counterpart being more zoophilic [30, 56]. It may therefore be concluded that An. arabiensis is an opportunistic feeder, feeding on both human and cattle depending on host availability. This is the basis of a line of thought that zooprophylaxis can be introduced to control malaria where An. arabiensis is the main malaria vector.

Separation of human living quarters and livestock quarters was found to be another key precondition in the process of implementing zooprophylaxis. In almost all instances where people and livestock shared the same house, people ended up at a higher risk of malaria infection [51, 64,65,66,67]. Thus, the presence of cattle may reduce the HBR as well as the HBI, but this is no guarantee for decreasing the estimated transmission risk or having a significant prophylactic effect. The fact that cattle may play a role as an attractant for vectors to human resting places has been proven in several reports [51, 64,65,66,67,68,69,81,70, 81, 82].

In addition to the presence of zoophilic vectors and the separation of humans and cattle, zooprophylaxis can be further strengthened if augmented with other interventions. This may include treatment of livestock with insecticides, with the primary purpose of killing mosquitoes that feed on the animal. Several reports show the success of this, including with using fungus formulations (bioinsecticide zooprophylaxis) [58], ivermectin [59, 61], deltamethrin, [60, 62, 83], permethrin, and lambda cyhalothrin [62]. In all instances, insecticide-treated animals significantly reduced survival rates of malaria vectors, as well as fecundity. Residual effects were longest in deltamethrin-treated cattle. Furthermore, a lower risk of malaria was reported when zooprophylaxis and other mainstay vector tools (LLINs and IRS) were used in combination [50, 53, 73, 77, 78].

As a negative side effect, the presence of cattle leads to a higher survival rate of An. arabiensis due to the abundance of available blood meals, increasing the mosquito population. This phenomenon of zoopotentiation calls for the need to evaluate zooprophylaxis as a control strategy thoroughly before introducing it into a community. Zoopotentiation may not only occur through an increase in blood meals and host availability, but also through cattle puddles, which provide an ideal breeding site for the development of mosquito larvae, hence increasing the mosquito population [74, 84].

Another point of caution is the fact that when mosquito abundance is enlarged, other vector-borne diseases may also increase in incidence. Both passive and active zooprophylaxis only divert mosquitoes to different hosts but cause no decrease in vector abundance. The advantage of insecticide zooprophylaxis is its ability to reduce the survival and fecundity of mosquitoes. However, this is not necessarily beneficial. A decrease in the number of zoophilic vectors may give rise to an increase of a different and possibly more anthropophilic vectors indirectly via decreased competition for larval space and resources. The result would be that insecticide zooprophylaxis would only reduce malaria transmission temporarily. Thus, further research on the possible consequences of the use of insecticide zooprophylaxis is required to make a more accurate evaluation. This review had certain limitations. A more objective selection of reports could be made by letting a number of people independently select or exclude certain reports. This could result in a more detailed description of the different methods used in experiments on zooprophylaxis.


Zooprophylaxis should be evaluated using a site-specific approach, as in some areas it is effective whereas in others it is not. The effectiveness depends on several factors including distance from human dwelling to the breeding site of mosquitoes and the use of other control strategies such as LLINs and IRS. These factors influence the resting behaviour of local malaria vectors. Moreover, the zoophilic behaviour of An. arabiensis varies in different African countries, showing a more anthropophilic behaviour in West Africa as compared to countries more to the east of the continent. This suggests that zooprophylaxis could be more effective in some East African countries, where the species are zoophilic. The use of other malaria control strategies may have also influenced the evaluated results of experiments on zooprophylaxis. Future studies, such those on an estimation of the distance threshold between human quarters and livestock pens, and the additive effect of repellents on zooprophylaxis, could further strengthen the value of zooprophylaxis in malaria vector control.



Human blood index


Human biting rate


Indoor residual spray


Insecticide treated net


Long-lasting insecticide-treated net


Odour based entry trap


World Health Organization


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The authors would like to acknowledge the Jimma University VLIR-IUC program for logistical support.


This study was financially supported by the Jimma University VLIR-IUC program.

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AA, GH, and DY were involved in the framing of the study and the drafting of the paper. BD was involved in the electronic data search. LD and DY critically commented on the paper. All authors read and approved the final version.

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Asale, A., Duchateau, L., Devleesschauwer, B. et al. Zooprophylaxis as a control strategy for malaria caused by the vector Anopheles arabiensis (Diptera: Culicidae): a systematic review. Infect Dis Poverty 6, 160 (2017).

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