1 Background

Small ruminant production is considered one of the principle sectors in the food supply chain. The great increase in the population and its demands for livestock products were the main propel of the development of small ruminant intensive production system in Egypt [1]. In developing countries, small ruminants engage an important niche for sustainable agriculture and support a variety of socioeconomic functions worldwide [2].

Goats, Capra hircus, are one of the most beneficial livestock. In Egypt, the development of rural areas could be realize depending on sheep and goats which is deemed as one of the most hopeful animals to fulfill the aims of meat production supplies for the humans [3, 4]. They are one of the important sources of animal protein mainly in the Arabian Countries.

Goats deem very beneficial in many industrial productions. They are used in ceremonial festivities as well as the production of cashmere and mohair fibers [5]. Such animals have very important medical purposes as they are used a source of preparation of human and animal vaccines, manufacturing of medical surgical threads from the small intestine and the formation of manure fertilizers for soil from their fecal pellets [4].

Parasitism is a challenge to the animal health worldwide resulting in economic losses [6]. High prevalences of nematodes, trematodes, cestodes, and protozoan infection have occurred among ruminants in most countries [7, 8] Helminthiasis, particularly parasites, causes gastroenteritis, is a serious health threat that affect the productivity of small ruminants due to the associated morbidity, mortality, cost of treatment and control measures [9]. Nematode parasites affect the animal productivity showing stunted growth, decrease weight gain and poor feed utilization [10]. Gastrointestinal parasites cause mortalities, production loss, and weight loss in small ruminants, thereby impeding their production system. Small ruminants constitute a significant portion of livestock in a country [11,12,13].

Goats reared under intensive production system are at great risk of Eimeria spp. infection [2, 14]. Coccidiosis is one of the highly prevalent parasitic diseases of goats all over the world [15, 16]. This disease results in economic losses due to high mortality and morbidity, poor growth and treatment costs [17, 18]. Coccidiosis occurred by intestinal protozoan parasite of the genus Eimeria [19,20,21]. Caprine coccidiosis caused by protozoa of the genus Eimeria is one of the foremost parasitic diseases affecting goats [22, 23].

Coccidian parasites of the genus Eimeria cause an enteric disease especially in young or stressed goats under poor farm management with a high mortality in goat kids [24, 25]. Clinical signs of coccidiosis comprises diarrhea, weight loss, anorexia and dehydration. Awareness of the inherent aspects of the disease is important in defining the appropriate preventative measures [26, 27].

Helminths and coccidia are mentioned to be the most common and important gastrointestinal parasites in small ruminants. In the tropics, the most important nematode species affecting small ruminants are Haemonchus contortus, Trichostrongylus species, Nematodirus species, Cooperia species, Bunostomum species and esophagostomum species [28, 29]. Parasitism in goats is a principle cause of lowered resistance, loss of production and even mortality. The present study was conducted to evaluate prevalence of Eimeria species and helminths in goats relative to various risk factors.

2 Methods

2.1 Study area and animals

Fresh fecal specimens were collected from 410 goats of various ages and genders allocated sporadically in small flocks kept in households in rural areas (average 7–20 animals/flock) owned by farmers in several districts of Minya province (coordinates: 28°07′10″ N 30°44′40″ E), Egypt during the period from October 2020 to September 2021. The age of animals was categorized as less than one year, one year and 2–5 years.

2.2 Specimens collection and laboratory examination

Fecal samples were collected directly from the rectum by using sterile disposable gloves. After labeling, containers were transported via cool box dry ice packs to the laboratory of Parasitology, Faculty of Veterinary Medicine, Beni-Suef University, Egypt. These were kept at 4 °C in a refrigerator until used. Fecal samples were parasitologically examined by the use of standard flotation technique to demonstrate oocysts of Eimeria spp and helminth eggs. As follows: Approximately 5 g feces from each animal were well mixed with 10 ml of fully saturated salt solution in a plastic cup. The mixture was strained through a tea strainer to discard the fecal debris. Then, the solution was poured into a 15 ml centrifuge tube then the flotation solution was added to the tip of tubes which were closed with cover slips. Tubes underwent centrifugation at 3000 rpm for 2 min and spinning, then, they allowed settling down. The flotation solution was added to the test tube till a reverse meniscus on the surface layer of this solution was formed, then clean dry cover slips were placed on the rim of tubes for 5 min then removed and examined microscopically using various magnifications. Sediments also were examined for trematode eggs [30, 31].

2.3 Fecal culture and harvesting larvae

The fecal samples were inform of pellets, so they were thoroughly crumbled before being mixed with water to produce more or less pasty mixture, which is slightly compacted, in a depth of about 5 cm in wide glass jars of approximately 1 L capacity. A hole is left in the center of the culture by holding a stamper vertically in the center of the jar, leaving the mixtures lightly compacted around it. The culture was sufficiently moistened to avoid dryness while being incubated, but without being water-logged. Then, jars were incubated in the dark at 26–28 °C for 5–7 days, during which it was periodically checked and moistened if needed. After the end of the incubation period, the inside of the culture is slightly sprayed with water before being placed in bright light that stimulates third larval stages to migrate up the inner surfaces of the jars’ walls. The culture was repeatedly harvested over several days by holding the jar sloped with the mouth pointing downwards and then spraying the inner walls and allowing the larval suspension to drain into suitable containers [32, 33].

2.4 Measurement of oocysts

The calibration of the microscope was done according to [34]. Briefly, using the low power of the compound microscope, the stage micrometer lines were brought into focus and adjusted the zero line of the stage micrometer to coincide with the zero line of the ocular micrometer. Another line on the ocular micrometer which exactly coincides with a second line on the stage scale was found. The number of spaces between the two lines was counted using the ocular scale and divided this number into the number of microns represented between the two lines on the stage (number of small spaces X 10 microns). Morphological characteristics (shape, size, color and existence or lack of micropyle and its cap) of the oocysts and sporocysts have been used to describe the coccidian oocysts species [2, 30, 35].

2.5 Larval identification

Morphological identification of parasitic neamtodes, is mainly dependent on the characterization of larval anterior and posterior ends, the whole larval length and the number of gut cells. The shape of the esophagus and the presence of anterior refractile bodies are needed for some species [33, 36]. Upon the identification of larvae, the tip of the anterior extremity of a larva is referred to as ‘head’ and the posterior extremity as ‘tail’ and the free sheath beyond the tail tip as the sheath tail extension (STE). The latter is a unique diagnostic feature for the accurate and appropriate identification of nematodal larvae.

2.6 Larval photographing

Available photographs of larvae were taken using a digital microscope (Leica microsystems, CH-9435 Heebrugg, Ec3, Singapore). Measurements of the recovered larvae were in micrometers [37].

2.7 Statistical analysis

Data were analyzed using a Microsoft Excel worksheet for Windows 2010. Data were summarized by descriptive statistics for the overall prevalence in sheep. The Chi-square test was used to analyze the effect of risk factors; age, sex and seasons, on the overall coccidian and helminth infections. Variables were significant at P ≤ 0.05.

2.8 Results

The current study revealed that overall prevalence of parasitic infections was 50.24% (206/410). Twenty two species of helminth eggs/Eimeria spp. oocysts were revealed. The prevalence of helminths was 21.95% (90/410) and that of Eimeria spp. was 39.27% (161/410). Mixed infection was reported in 10.98% (45/410). The highest prevalence reported in young animals (75.0%; 60/80) followed by yearlings (58.46%; 76/130) and the lowest one was in adults (70/200; 35.0%). The infection rate was higher in females (59.02%; 180/305) than males (24.76%; 26/105). The infection rate was the highest in summer (63.85%; 83/130) followed by winter (57.78%; 52/90), autumn (40.0%; 28/70) and the lowest one was in spring (35.83%; 43/120). Age, sex and seasonal variations revealed significant (P ≤ 0.05) differences among examined goats. The infection with both nematodes and Eimeria spp. were detected in 7.32% (30/410). The infection with Eimeria spp. and tapeworms were found in 2.93% (12/410). Both trematodes and Eimeria spp. were seen in 0.73% (3/410) of examined specimens. Nine Eimeria species were recorded; Eimeria ninakohlyakim-ovae, E. hirci, E. caprinova, E. caprina, E. christenseni, E. jolchijevi, E. arloingi, E. apsheronica and E. alijevi (Figs. 1 and 2). The most predominant Eimeria species was Eimeria arloingi (23.17%; 95/410) followed by E. ninakohlyakim-ovae (20.24%; 83/410), E. alijevi (9.76%; 40/410), E. caprina (3.66%; 15/410), E. caprinova (3.17%; 13/410), E. hirci (2.93%; 12/410), E. jolchijevi (1.95%; 8/410), E. christenseni (1.71%; 7/410). The least abundant species was E. apsheronica (0.73%; 3/410). The revealed trematodes were Fasciola spp. (0.49%) and Paramphistomum spp. (0.24%). Among cestodes, tapeworms belonged to Anoplocephalids included Moniezia spp. (7.31%) and Avitellina sp. (0.49%) were detected. Meanwhile, coproculture revealed that the prevalence of nematodes infection was 13.41% (55/410) including nine species; Chabertia ovina, Ostertagia ostertagi, Haemonchus contortus, Trichostrongylus axei, T. Colubriformis,Bunostomum sp., Cooperia oncophora, Cooperia curticei and Strongyloides spp. (Figs. 3 and 4) The most predominant nematode was Haemonchus contortus (5.36%; 22/410) followed by Trichostrongylus axei (1.95%; 8/410), Ostertagia ostertagi (1.71%; 7/410), Bunostomum sp. and Chabertia ovina (0.98%; 4/410) for each, T. Colubriformis and Cooperia curticei (0.73%; 3/410 each). The least abundant nematodes were Strongyloides spp. and Cooperia oncophora (0.49%; 2/410 each).

Fig. 1
figure 1

Morphology of 4 Eimeria species recovered from examined goats. a Eimeria arloingi unsporulated oocyst. Note a distinct micropyle and the polar cap is lid-like and easily dislodged. Scale bar = 25 µm. Inset: The sporulated oocyst has elongated sporocysts with broad ended sporozoites. Scale bar = 25 µm. b Eimeria christenseni unsporulated oocyst. Note a distinct micropyle and polar cap. Scale bar = 20 µm. Inset: The sporulated oocyst has ovoid sporocysts with broad ended sporozoites Scale bar = 20 µm. c Eimeria hirci unsporulated oocyst Note a spherical oocyst with a distinct micropyle and polar cap. Scale bar = 10 µm. Inset: The sporulated oocyst has rounded sporocysts and each has two vacuoles. Scale bar = 25 µm. d Eimeria jolchijevi unsporulated oocyst. Note a distinct micropyle and polar cap. Scale bar = 25 µm. Inset: The sporulated oocyst has rounded/ovoid sporocysts. Scale bar = 25 µm

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Fig. 2
figure 2

Morphology of 5 Eimeria species recovered from examined goats. a Eimeria caprina unsporulated oocyst. Note an ellipsoidal-shaped, without a micropylar cap but has a distinct micropyle. Scale bar = 25 µm. b Eimeria caprovina unsporulated oocyst: The unsporulated oocyst was broad oval with amicropyle; without a micropylar cap. Scale bar = 25 µm. c Eimeria ninakohlyakim-ovae unsporulated oocyst. Note the lack of micropyle and polar cap (arrowhead). Scale bar = 10 µm. d Eimeria apsheronica unsporulated oocyst. Note ovoid-shaped oocyst, adistinct micropyle but no micropyle cap. Scale bar = 25 µm. e Eimeria aljevi unsporulated oocyst. Note the lack of micropyle and polar cap. The beginning of sporont division (arrow). Scale bar = 25 µm. f Eimeria aljevi sporulated oocyst. Note the lack of micropyle and polar cap. Scale bar = 25 µm

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Fig. 3
figure 3

Morphology of 4 harvested L3 recovered from examined goats. a Trichostrongylus axei larva. Note a straight larva with rounded head, simple tail and blunt terminal end. No filament and the gut had 16 intestinal cells. Scale bar = 100 µm. b Trichostrongylus Colubriformis larva. Left: The whole straight larva. Scale bar = 100 µm. Middle: Anterior end showing a rounded head and the gut had 16 intestinal cells. Right: Posterior end revealing no filament tail with 2–3 tubercles (bifid structure). Scale bar = 50 µm. c Cooperia curticei larva. Note a medium-sized larva with a square-shaped head. Head bearing two refractile oval bodies at anterior end of the esophagus. The caudal tip of the sheath finer tip and vanish into nothingness. Scale bar = 100 µm. d Cooperia oncophora. Note a medium-sized larva with a square-shaped head. Scale bar = 100 µm. Inset left: Note a head bearing two refractile oval bodies at anterior end of the esophagus. Inset right: Note the caudal tip of the sheath of C. oncophora is clearly perceptible. Scale bar = 50 µm

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Fig. 4
figure 4

Morphology of 5 harvested L3 recovered from examined goats. a Bunostomum sp. Note the head was bullet. The esophagus has a prominent bulb caudally and it had 16 intestinal cells. Scale bar = 100 µm. b Chabertia ovina. Note a long larva. Scale bar = 100. Inset lower: Note a square-shaped head with 28–32 rectangular-shaped intestinal cells. Scale bar = 50. Inset higher: Note a long thin tail sheath. The filament was medium-sized measuring 33 μm long (approximately 30% of the tail sheath long). Scale bar = 50. c Haemonchus sp. Note a medium-sized larva, bullet-shaped head with 16 alternating zigzag-shaped intestinal cells. The tail of the sheath tapers to end in a whip-like, medium-sized filament and usually kinked. d Ostertagia ostertagi. Note a medium-sized larva. Scale bar = 100. Inset left: Note a slight shoulder close to the anterior end (squarish appearance) with 16 intestinal cells. Inset right: The tail is rounded at its end with a short tail sheath (57.14 μm) and blunt tail tip without a filament. Scale bar = 50. e Strongyloides sp. Note a small slender short larva, measured 507.93 μm in length with uniquely very long esophagus extending nearly for 40% of the body length. Scale bar = 100 μm. Inset right: Note the absence of tail sheath and high magnification shows that the tail is bifid. Scale bar = 50 μm

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Concerning the age, it has been recorded that goats aged less than one had the highest infection rate. Among those, a mixed infection was detected in 8.75% (7/80). Nematode helminths were identified in 3.75% (3/80). Eimeria spp. were detected in 75.0% (60/80), trematode parasites were reported in 1.25% (one/80) and tapeworms were recorded in 3.75% (3/80) of examined goats. Among animals aged one year, 10.77% (14/130) had tapeworms. A mixed infection was observed in 7.69% (10/130). Meanwhile, Eimeria spp. oocysts were revealed in 50.0% (65/130), nematodes were recorded in 5.38% (7/130). However, no trematodes were recorded. Goats aged 2–5 years had the lowest infection rate. Among those, nematodes were observed in 22.5% (45/200), mixed infection was found in 14.0% (28/200), Eimeria spp. oocysts were detected in 36/200 (18.0%), tapeworms were recovered in 7.5% (15/200) and trematodes were recorded in 1.0% (2/200) of examined goats. There was a significant difference of the total parasitic infections (Chi-square value was 13.5306 at P value 0.001153) (Table 1).

Table 1 The prevalence of helminths and/or coccidian oocysts in examined goats relative to the age
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Regarding the sex, infection rates in male goats with helminths and/or Eimeria spp oocysts were 7.62% (8/105), 18.1% (19/105), 20.95% (22/105), 13.3% (14/105) and 0.95% (1/105) for nematodes, mixed infections, Eimeria spp. oocysts, tapeworms and trematodes, respectively. Moreover, prevalences in female goats were 15.4% (47/305), 8.52% (26/305), 45.57% (139/305), 5.9% (18/305) and 0.66% (2/305) for nematodes, mixed infections, Eimeria spp. oocysts, tapeworms and trematodes, respectively. Based on the sex, there was a significant difference of the total parasitic infections (Chi-square value was 14.35 at P value 0.000152) (Table 2).

Table 2 The prevalence of helminth and/or coccidian oocysts in examined goats relative to the sex
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Seasonal variation affect significantly on the parasitic infection that the highest prevalence was found in summer followed by winter, spring and lowest one was reported in autumn. In summer, Eimeria spp. oocysts were the highest (48.46%; 63/130), mixed infection was reported in 8.46% (11/1130), nematodes were seen in 13.85% (18/130), tapeworms were recorded in 9.23% (12/130) and trematodes were found in 0.77% (1/130). In winter, infection rates were 18.89% (17/90), 14.44% (12/90), 46.67% (42/90) and 6.67% (6/90), for nematodes, mixed infections, Eimeria spp. oocysts, tapeworms, respectively, no trematodes were recorded. In spring, infection rates were 10.83% (13/120), 10.83% (13/90), 28.33% (34/120), 6.67% (8/120), and 0.83% (1/120), for nematodes, mixed infections, Eimeria spp. oocysts, tapeworms and trematodes, respectively. In autumn, percentages of nematodes were 10.0% (7/70), Eimeria spp. oocysts 31.43% (22/70), tapeworms 8.57% (6/70), trematodes in 1.43% (one/70) and mixed infections 11.43% (8/70) (Table 3). Statistically, significant differences were detected in the total parasitic infection (Chi-square was 8.2618 at P value 0.0409). Morphological characteristics of recovered Eimeria spp. oocysts are illustrated in Table 4. As well, morphological features of the harvested L3 are mentioned in Table 5.

Table 3 The prevalence of helminths and/or coccidian oocysts in examined goats relative to the seasonal variation
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Table 4 Morphological characteristics of recovered Eimeria spp. Oocysts
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Table 5 Morphological features of the harvested GIT third stage larvae
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3 Discussion

The current study revealed that the overall prevalence of parasitism referred to coprological examination of domestic goats was 50.24% (206/410). Such result was lower than that given by [38].who revealed a prevalence of 96.38% in Giza, Egypt. Similarly, [Esayas [39], Tesfalem [40], Bayou [41], Yoseph [42], Genene [43], Getachew [44], Tefera et al. [45], Bikila et al. [46], Nuraddis et al. [47] from Jimma and from Illubabor, reported prevalences of 82.13%, 84.32%, 94.85%, 94.1%, 92.24%, 88.33%, 93.29%, 77.8% and 87.2%, respectively. Moreover, Asif et al. [48] found that the infection rate was 63.69%. Gadahi et al. [49] reported that 66.45% of examined goats had gastrointestinal parasites. Dabasa et al. [50] detected a prevalence of 79.6%. Kedir et al. [51] from south eastern Ethiopia, recorded an infection rate of 52.78% [13] found that the infection rate was 82.43% in goats in Pakistan. However, it was higher than that reported by Dagnachew et al. [52] who reported a prevalence of 47.67%, Negasi et al. [53] and Das et al. [54] who observed a relatively lower prevalence of gastrointestinal parasites (35.33% and 28.65%, respectively). This variation could be attributed to the difference in agroecology of the study area, climatic changes, management system and deworming activities performed in respective areas.

The prevalence of helminthiasis was 21.95%. Such result was lower than that reported by Dereje [55] who revealed an infection rate of 98.18% in/and around Wolaita Sodo, Hailelul [56] who reported a prevalence of 95.24% in/and around Wollaita Soddo and Tefera et al. [45] who found that 95.0% of goats were affected with one or more helminth species. This variation could be referred to the discrepancy in hygiene systems and management in various districts.

Currently, the prevalence of nematodes infection was 13.41% including nine species; Chabertia ovina, Ostertagia ostertagi, Haemonchus contortus, Trichostrongylus axei, T. Colubriformis,Bunostomum sp., Cooperia oncophora, Cooperia curticei and Strongyloides spp (Figs. 3 and 4). Such result was lower than that obtained by Kuma et al. [57] who recorded a high prevalence of gastrointestinal tract infection (87.9%) in examined goats in Kalhari farm. Lower prevalences were reported in previous literature indicating 34.2%-84.1% (Yimer et al. [58], Ahmed et al. [59]).On the other hand, a higher prevalence was reported by Wondimu et al. [60]. This variation might be due to differences in agroecological conditions and management system. The present study revealed that the prevalence of Moniezia spp. was 7.31%. Such finding was lower than that conducted by Sultan et al. [3] and Hassan et al. [38] in Giza, Egypt, Negasi et al. [53], Das et al. [54] and Verma et al. [61] who recorded Moniezia spp. with prevalences of 18.22%, 19.04%, 15.09%, 10.0% and 18.74%, respectively. In Egypt, Abdelazeem et al. [4] recorded a lower infection rate of 6.7%. The prevalence of Avitellina sp. was 0.49%. Such prevalence was lower than that revealed by Esayas [39] who reported a prevalence of 7.86% in Ogaden, Hailelul [56] who reported 11.90% and Tefera et al. [45] who recorded a prevalence of 40.0%. This variation might be due to existence of the intermediate hosts, oribatid mites, management system and control methods.

The prevalence of Haemonchus contortus was 5.36%. Such prevalence was lower than that reported by Arafa [62] in Beni-Suef reported an infection rate of 19.5%, El-Shahawy et al. [63] who detected the nematode in 15.5% of the examined goats in Upper Egypt and Gareh et al. [64] who recovered an infection rate of 16.66%. Meanwhile, Tefera et al. [45], Hailelul [56] who reported 65.0% and 54.76%, respectively. Such result was higher than that reported by Tripathi et al. [65] who reported an infection rate of 3.43% in Shivraj. The differences in prevalences could be attributed to the basis of differential management practices (Mandonnet [66]), natural resistance (Soulsby [67]) and drugs administration (Barnes et al. [68]). Concerning Trichstrongylus species, the prevalence of T. axei was 1.95% and that of T. colubriformis was 0.73%. Such finding was lower than that reported by El-Khtam [69] in Menofia, Egypt (18.42%), Elsedawy et al. [70] in Dakahlia,Egypt (14.7%), [45] (55.0%) and Esayas [39] (16.59%) in Ogaden. The current finding was slightly lower than that obtained by Hamad [71] who recorded 3.7% in Aswan, Egypt. Variations in infection rates might be attributed to management patterns. Herein, the prevalence of Chabertia ovina was 0.98%. Such prevalence was lower than that given by Tefera et al. [45] who detected a prevalence of 25% and Arafa et al. [72] who reported an infection rate 2.6% in Assiut, Egypt. The prevalence of Ostertagia ostertagi was 1.71%. Such prevalence was lower than that obtained by Tefera et al. [45] (25%), Dabasa et al. [50] (1.7%) and Amenu [73] (15.6%) in goats of three agro ecological zones of southern Ethiopia.

Currently, Strongyloides spp. was revealed in 0.49% of examined goats. Such prevalence was lower than that given by Hassan et al. [38] who recorded prevalence of S. papillosus with 3.55% in Egypt, Dabasa et al. [50] who reported Strongyloides spp. in 25.36%, Singh et al. [74] (9.17%), Yusof [8] (45.6%), Das et al. [54] (8.91%) and Verma et al. [61] (0.7%). Such discrepancy might be due to the existence of various degrees of immunity of examined animals as well as geographical and environmental and managemental system.

The prevalence of Bunostomum sp. was 0.98%. Such result was lower than that obtained by Tefera et al. [45] (35.0%) in Ethiopia and Esayas [39] (59.38%) in Ogaden. The prevalence of Cooperia oncophora was 0.49%. A lower infection rate was given by Arafa et al. [72] (2.6%).

Concerning the infection with digenean trematodes, the prevalence of Fasciola spp. was 0.49%. Such prevalence was lower than that reported by Haridy et al. [75] (3.54%), Sobhy [76] (3.41%), Arafa et al. [72] (3.7%), Negasi et al. [53] (20.75%), El-Shahawy et al. [63] (4.4%) and Hassan et al. [38] (0.89%). Those variations might be due to proper and progressive application of control measures against fascioliasis in Egypt. Furthermore, Paramphistomum spp.  was detected in 0.24% of examined goats. Such prevalence was lower than that achieved by Hassan et al. [38] who found rumen flukes in 0.9% of animals and El-Shahawy et al. [63] who recorded Paramphistomum microbothrium (2.2%) in Upper Egypt.

Concerning the age, prevalence of gastrointestinal helminth parasites was the highest in goats aged 2–5 years. Such finding disagreed with that given by Bedada et al. [77] who conducted that the prevalence of helminth parasites was higher in adult animals than young ones. However, age wise observation revealed no statistically significant difference. This finding coincided with reports from Gambia and Semi-arid part of Kenya indicated that GIT helminths affect both ages insignificantly (Waruiru et al. [78]). The present finding disagreed with previous literatures Gamble et al. [79]. In the authors’ opinion, such conflict might be attributed to variation of immune system.

Regarding to the sex, the present study concluded that females had a higher infection rate than males. Such result went parallel with that reported by Bedada et al. [77], Hassan et al. [38] who reported that female goats appear to be more susceptible to parasitic infections than male goats (Tariq et al. [80], Zvinorova et al. [81]).

Furthermore, the present study showed that the prevalence of infection was the highest in summer followed by winter, spring and lowest one was reported in autumn. Similarly, Biswas et al. [82] reported the highest prevalence in summer season (84.6%), followed by rainy (83.6%) and winter (81.2%) seasons in Bhola district, Bangladesh. However, this disagreed with that detected by Yadav et al. [83] who reported the highest prevalence during rainy season (88.5%) in Jammu Province, Kashmir (summer 83.2% and winter 76.0%) seasons. Singh et al. [74] recorded the maximum prevalence during monsoons (98.0%) while the minimum was recorded in winter (91.7%) in Madhya Pradesh, India. Also, Singh et al. [74] revealed the highest seasonal variation during rainy (90.10%) (winter 83.84% and summer 78.35%) in Punjab, India. Higher GIT helminths during the rainy season might be due to suitable environmental conditions for growth and development of GIT parasites and their larval stages.

Currently, the prevalence of Eimeria spp. infection was 39.27% (161/410). The obtained results were lower than those mentioned by Hassanen et al. [2].who recorded 83.6% infection rate in sharkia, Egypt, Radfar et al. [84] who recorded that the prevalence was 89.27% in Iran. Tefera et al. [45] conducted 100% of examined goats infected with Eimeria spp. Kheirandish et al. [85] who found that 89.9% had Eimeria spp. oocysts in Iran, Similarly in Egypt, El-Shahawy [86] (65.07%) in Upper Egypt, Mohamaden et al. [87] (60.0%), Hassan et al. [38] (76.89%), Abdelaziz et al. [23] (40.63%) in northern and southern Egypt. Such results were higher than those reported by Das et al. [54] who detected that the infection rate was 23%. In the present investigation, 9 Eimeria species were recorded; Eimeria ninakohlyakim-ovae, E. hirci, E. caprinova, E. caprina, E. christenseni, E. jolchijevi, E. arloingi, E. apsheronica and E. alijevi (Figs. 1 and 2). The most predominant species was E. arloingi (23.17%) followed by E. ninakohlyakim-ovae (20.24%), E. alijevi (9.76%), E. caprina (3.66%), E. caprinova (3.17%), E. hirci (2.93%), E. jolchijevi (1.95%), E. christenseni (1.71%). In Egypt, El-Shahawy [86] identified seven Eimeria species, E. ninakohlyakim-ovae, E. hirci, E. caprina, E. christenseni, E. jolchijevi, E. apsheronica and E. The least abundant species was E. apsheronica (0.73%). Similar species were recorded by Hassanen et al. [2]. Mohamaden et al. [87] recovered E. arloingi (37.04%), E. ninakohlyakim-ovae (30.86%) and E. hirci (24.69%) in goat feces. Abdelaziz et al. [23] recorded 4 species of Eimeria; Eimeria arloingi, E. caprina, E. caprovina and E. hirci. In Turkey, Deger et al. [88] identified E. arloingi (47.43%), E. christenseni (45.14%), E. ninakohlyakim-ovae (36.00%), E. alijevi (26.85%), E. hirci (23.42%), E. caprina (18.28%) and E. caprovina (16.57%). In China, Zhao et al. [89] reported 6 Eimeria species: E. jolchijevi, E. arloingi, E. alijevi, E. caprina, E. hirci and E. christenseni. Concomitantly, de Macedo et al. [27] revealed E. jolchijevi, E. arloingi, E. alijevi, E. caprina, E. hirci, and E. christenseni. arloingi. Alcala-Canto et al. [90] determined eight species; E. caprovina, E. christenseni, E. hirci, E. arloingi, E. caprina, E. alijevi, E. ninakohlyakim-ovae, and E. Jolchijevi.

Regarding the coccidiosis relative to the age, the infection rate was higher in females (45.57%) than males (20.95%). This finding was in agreement with that given by Hassanen et al. [2]. Previous literature reported that ewes and does are exposed to physiological stress in relation to pregnancy, giving birth and lactation that make it more susceptible to Eimeria spp. infection than males (Rehman et al. [19], Mohamaden et al. [87]). However, Ibrahim [91], Mohamaden et al. [87] and de Macedo et al. [27] reported that both sexes were equally susceptible to coccidiosis in goats.

Concerning season, the highest infection rate was in summer (48.46%) and winter (46.67%) followed by spring (28.33%) and autumn (10.0%). Sharma et al. [92] demonstrated that in winter and spring, the infection rate was the highest. This might be due to the availability of the suitable temperature and humidity, and oxygenation that is needed for oocysts sporulation. However, Abdelaziz et al. [23] reported that the infection rate in the winter was significantly the highest, followed by spring, autumn, and the lowest infection rate was in summer. Smith et al. [5] mentioned that hot and humid weather is particularly conducive to sporocysts development and outbreaks of clinical coccidiosis. Concerning the age, it has been recorded that goats aged less than one year had the highest infection rate of Eimeria spp. (75.0%). The prevalence of coccidiosis in animals aged one year was 50.0%. Goats aged 2–5 years had the lowest infection rate (18.0%). This might be attributed to the low immune status in young kids, and the absence of humoral/cellular immune response that can counter attack the sporozoites into epithelial cells of the small intestine of the infected host. Similar results were observed by Maichomo et al. [93] in Pakistan. Yusof [8] found that the prevalence of Eimeria oocysts was significantly higher in young goats compared to adults. On the other hand, in Egypt, Abdelaziz et al. [23] found that adult goats were more susceptible to coccidiosis.

4 Conclusion

It is concluded that in the present study, the prevalence of helminths was 21.95% and that of Eimeria spp. was 39.27%, which is considered a high infection rate. The highest prevalence of parasitic infection was found in young animals (75.0%; 60/80) in authors opinion this was due to reduction in resistance of diseases and decreased required immunity. Higher prevalence was in females (59.02%; 180/305) than males, authors attributed the higher infection rate in females to the hormonal imbalance during both pregnancy and lactation (24.76%; 26/105). The parasitic infection was mostly highest in summer (63.85%) this might be due to availability of the suitable temperature and humidity, and oxygenation that is needed for oocysts sporulation and GIT parasites; Accordingly, periodical monitoring as well as effective and well-planned control measures to check the parasitic population in small ruminants have to been implicated by conducting extension programs to educate the farmers regarding the proper use of anthelmintics.