Walaa Emeish

South Valley University

Tick-borne diseases in animals are increasing rapidly worldwide, but there is insufficient information about tick-borne diseases infecting dogs in southern Egypt. Thus, in the current study, we detected the presence of Anaplasma marginale (A. marginale) and Babesia canis vogeli (B. canis vogeli) in the blood of dogs. The results revealed that 4/100...

The aim of this research was to estimate the immunopotentiation effect of brown algae Padina boergesenii water extract on Nile tilapia, Oreochromis niloticus through resistance to Pseudomonas putida infection. Gas Chromatography Mass Spectrometry was utilized to characterize the seaweed phytoconstituents. One hundred and twenty-six fish were divide...

Background Tick-borne diseases cause economically significant losses to animal production globally, and anaplasmosis and theileriosis are associated with the greatest losses. However, the spread of the relevant pathogens in flocks of domesticated animals in southern Egypt is little understood. Accordingly, in this study, we aimed to determine the p...

Polystyrene nanoplastic (PS-NPs) and Engine oil (EO) pose multiple ecotoxic effects with increasing threat to fish ecosystems. The current study investigated the toxicity of 15 days exposure to PS-NPs and / or EO to explore their combined synergistic effects on Nile tilapia, Oreochromis niloticus (O. niloticus). Hematobiochemical parameters, proinf...

Objective During Egypt's hot summer season, Aeromonas veronii infection causes catastrophic mortality on Nile Tilapia Oreochromis niloticus farms. Egypt is ranked first in aquaculture production in Africa, sixth in aquaculture production worldwide, and third in global tilapia production. This study aimed to investigate, at the molecular level, the...

Background Telocytes are modified interstitial cells that communicate with other types of cells, including stem cells. Stemness properties render them more susceptible to environmental conditions. The current morphological investigation examined the reactions of telocytes to salt stress in relation to stem cells and myoblasts. The common carp are s...

Telocytes establish connections and communicate with various types of cells and structures. Few experimental studies have been performed on telocytes. In this study, we investigated the effect of salinity stress on telocytes in relation to osmoregulatory, immune, and stem cells. After exposing the common carp to 0.2 (control), 6, 10, or 14 ppt sali...

Henneguya species are myxozoans, a suborder of Cnidaria, which can affect the gills and extrarespiratory organs of the African sharptooth catfish, Clarias gariepinus. This research describes natural infection-induced histological alterations caused by the Henneguya species present. The Henneguya species were also identified molecularly using DNA se...

The present study investigated the effects of dietary supplementation of nanocurcumin (NCur = 150 ppm) in African catfish feed for 15 days along with two doses of florfenicol—a therapeutic dose (FFC1 = 10 mg/kg.BW) and a high dose (FFC2 = 30 mg/kg.BW). Serum biochemical parameters and histopathological changes in liver and kidney tissues were deter...

Salinity stress is one of the marked influencing factors on the ecophysiology of aquaculture and is considered an important reason for the retreat of the fish industry. The current study is an endeavor to elucidate the molecular mechanisms that underlie the response to salinity stress in common carp. Fish (Average weight 5 ± 2 g) were randomly dist...

Diet quality has an important effect on the living organism’s physiological biomarkers. This study aimed to investigate the modulation of the immune response and oxidative stress of Clarias gariepinus by the florfenicol (FFC) and nanocurcumin (NCur) as feed additives. Moreover, the ameliorative effects of NCur against FFC toxicity were assessed. Bl...

Ammonia is one of the most harmful water quality parameters restricting the growth and survival of aquatic living organisms. As a result, fish must adapt to this stressor by modifying physiological processes that are governed by gene expression regulation. The aim of the present study was to investigate the expression profiles of antioxidant relate...

n summer 2021, acute mortalities occurred in Nile tilapia farm in Qena governorate. Different hypothesis including the implication of environmental factors, and/or pathogens have been explored. Clinical, parasitological and bacteriological examinations have been performed. In addition, the water quality parameters were assessed. The clinical invest...

Bacterial septicemia are responsible for severe losses in fish farms over the world. This study aimed to investigate the Enterobacteriaceae infections in sharptooth catfish Clarias gariepinus. A total of 120 catfish were collected from small canal in Farshout, Qena Governorate, and were subjected to clinical and bacteriological examination. Catfish...

Lactoferrin is a multifunctional protein that has roles in iron metabolism, cell generation and differentiation, and antibacterial, antiviral, and antiparasitic activity. The study aim was to evaluate the effect of dietary lactoferrin powder on the innate immune response and disease resistance of silver carp ( Hypophthalmichthys molitrix ) infected...

Piscine mast cells or eosinophilic granule cells (EGCs) of fish are equivalent to the mammalian mast cells. Recently, a better understanding of EGCs functions is allowed because of the growing interest in fish models. Herein, we present a trial to furnish data regarding the distribution of the EGCs in the fish olfactory organ, an issue that has not...

This study was conducted to investigate the ability of common carp, Cyprinus carpio, to adapt to various salinity levels. Two experiments were conducted to study the effects of gradual increase of salinity on weight gain, survival, immunological and osmoregulatory responses and consequent resistance to Vibrio vulnificus infections in common carp. I...

In this report, we describe the responses of Rodlet cells (RCs) of Nile Tilapia, Oreochromis niloticus, with other inflammatory indicators to infections by encysted metacercariae trematodes. RCs are specialized cells of the non-specific immune system of some species of teleosts fish. Sixty eight out of 100 examined fish specimens were found to be n...

Medicinal herbal feed that used as feed additives are widely applied in livestock production and may be applicable to aquaculture production systems. The present study explores the modulatory effects of incorporation of herbal combination of black cumin seeds (Nigella sativa), peppermint (Mentha piperita) and fennel (Foeniculum vulgare), on African...

The aim of this study was to investigate the dominant species of Aeromonas in naturally infected African sharptooth catfish, Clarias gariepinus, in Qena, Egypt and the distribution of two virulence genes among the isolates to assess their pathogenicity. Twenty-five isolates of Aeromonas were recovered from infected fish showing signs of septicemia....

The present study is designed to investigate the Pro-bac, a commercial probiotic as an immunostimulant, growth promoter and antibacterial, for African Sharptooth Catfish, Clarias gariepinus. The immuno-potentiation effects of Pro-bac probiotic were investigated after 30 successive days of dietary supplementation of catfish. Seventy-two apparently h...

Bacterial septicemia are responsible for severe losses in fish farms over the world. This study aimed to investigate the Enterobacteriaceae infections in sharptooth catfish Clarias gariepinus. A total of 120 catfish were collected from small canal in Farshout, Qena Governorate, and were subjected to clinical and bacteriological examination. Catfish...

Contamination of fish by fungi and their mycotoxins poses major health concerns to human and animals. Therefore, our study was aimed to investigate Aspergillus flavus (A. flavus) infections and the levels of aflatoxins in Nile tilapia, Oreochromis niloticus (O. niloticus), and fish feed. Samples from O. niloticus and fish feed (n=25 for each) were...

statement The article represent an experimental study in which we investigated the effect of the ssalinty on the communicating cells (telocytes) and their target cells including chloride, stem, Rodlet cells, myoblasts Abstract Telocyte is a communicating cell established relations to various types of cells. Few experimental studies are performed o...

The aim of this study was to investigate the modulation effects of thyme and fenugreek as food additives on sharptooth catfish immunity. Three diet regimes, a basic (control); Thyme diet (1%) and fenugreek diet (1%) were formulated and used to feed fish for 30 successive days. Half of the fish were used to investigate some of the immune parameters...

The aim of this study was to investigate the prevalence of columnaris disease in wild sharptooth catfish, Clarias gariepinus, in Upper Egypt. Columnaris was detected in 7 (4.86%) fish out of the 144 fish collected indicating light infection. The main signs observed on fish were paleness and sloughing of gill filaments, in addition to skin erosions...