The increasing impact of some parasitoses on fish health and its economic relevance in aquaculture and fisheries has enhanced the need for studies on piscine parasites and on the fish-parasite relationships. Fish parasites are an important part of water ecosystems, and thus, changes in these habitats can affect the host-parasite equilibrium. The research teams leaded by the author have studied piscine parasites in Spanish waters since 1970. In this Part 1, the parasite fauna of continental fish (mainly salmonids and cyprinids), mostly collected in rives of the Duero basin (NW Spain) from 1970 to 1984, is presented, including 62 figures. After a brief reference to the pathologcal concern of some fish parasitoses, the population dynamics of the found parasites is analysed. The helminth fauna of macroinvertebrates of some rivers is also reported in relation to the helminth life cycles. Some recent findings on this filed in Spain and in other European countries are also commented and compared. This book is useful for students or graduates in Bological Sciences and Veterinary Medicine, and also for ecologists or ichthyologists interested in the role of parasites in aquatic habitats.
Monogenean parasites of freshwater fish could be considered as one of the most prevalent diseases affecting skin and gills, which included irritation, severe destruction of the gills, impaired breathing as well as severe losses too. They are the most abundant ectoprasitic flukes of fish, with greater diversity of species occurring in tropics than in the temperate regions of the world. They spend their entire life cycle as parasites on gills and skin of fish, hold to the fish by the use of hooks and attachment organs at the posterior end.This study investigates the prevalence of these parasites infecting some of the economically important fresh water fish from the River Nile at Qena province, Egypt. This is followed by detailed description by means of light microscopy of the recorded parasite species including a detailed description of the different parts of the recovered worms.
Parasitology today focused on studying parasites infecting fish. Parasitic infestation is one of the most important problems facing fish breeding and production. All fish carry pathogens and parasites. Among fish parasites, especially ectoparasites, protozoa occupy a very important and dangerous group that causes severe economic losses and mortalities in freshwater pisciculture. Also, monogenetic trematodes of freshwater fishes could be considered as one of the most prevalent diseases affecting skin and gills, which included irritation, severe destruction of the gills, impaired breathing as well as severe losses too.the present study aimed to investigate the incidence, identification and morphological description of some protozoan parasites and monogenetic trematodes infecting different fresh water fish species collected from two different ecosystems along the River Nile in Egypt, the first ecosystem represented by a location at Giza province, and the Pharonic Sea located at Menoufia province represented the other ecosystem. This study depended on light and transmission electron microscopy.
Fish are well known to act as direct or indirect carriers of different zoonotic pathogens including parasites, viruses, bacteria and fungi. Parasitic infection is one of the most important problems facing fish breeding and production at commercial scales. So the most important reason for studying fish parasites is to study the relationships of these parasites to fishes, animals and man and also to understand some human health problems. Helminthosis is the disease caused by the presence of helminth parasites within or outside the gastrointestinal tract of an individual. All species of animals can be infected with helminth parasites. The infection usually is more severe in the very young and the very old or immunocompromised individuals. Some adult animals can thrive fairly well while infected with some helminth parasites without showing obvious clinical signs while the vast majority suffer reduced productivity under heavy worm burdens. It appears that some breeds of animals are more resistant to certain helminth parasites than others. Helminthosis has been a long time standing problem against breeding of fish hosts leading to economic loses that may reach billions of dollars.
Fish are well known to act as direct or indirect carriers of different zoonotic pathogens including parasites, viruses, bacteria and fungi. Parasitic infection is one of the most important problems facing fish breeding and production at commercial scales. So the most important reason for studying fish parasites is to study the relationships of these parasites to fishes, animals and man and also to understand some human health problems.The name "monogenea" means born once, and refers to the simple life cycle. In heavy infections, they can kill captive fish and occasionally wild ones.Gillworms have a distinct attachment organ on their posterior end called a haptor (or opisthaptor) with hardened anchors or specialized clamps to pierce the epithelium and hold on to the host, sclerotized marginal hooks often surround the haptor, and bars, disks, scales or spines may occur on or near the haptor, the head sometimes has eye spots and specialized holdfast organs, many monogenean parasites of big game fish have large suckers or numerous clamps adapted for holding on to these fast moving animals.
Parasitological research today focused on studying protozoan parasites infecting fish especially myxosporidian and microsporidian parasites which cause adverse effects on the fish health causing high losses in fish production. Also the presence of Heavy infections with muscle-invading species destroy the texture of the fish flesh making it unmarketable. Morphological description of these parasites help in the exact determination of their taxonomy which may aid with the molecular tools in the development of anti substances against these parasites. The present book described some of these parasites including two myxosporidian and three microsporidian species infecting flesh of four of the most economically important marine fishes of the Red Sea in Egypt. The study described the different developmental stages of these parasites which undergoes its maturation within fish flesh until its progressive development into the infective spores which are the most dangerous and infective part of the cycle.
Средство против грибков и паразитов в садовых прудах. Сильно колеблющаяся температура и перенаселённость пруда ослабляют сопротивляемость рыб заболеваниям. sera pond omnisan уничтожает паразитов и разрушает споры грибков. Безвреден для рыб и растений. Информация с сайта производителя
Sera Omnisan Средство для уничтожения грибков и паразитов в садовых прудах. Данное средство предназначено для борьбы с вредными грибками и паразитами в садовых водоемах. При внесении немедленно начинает разрушать споры грибов. Тормозит активность любых паразитов. Дезинфицирует прудовую воду. Безопасен для рыб и растений. Применение: вносить 3 дня подряд по 100мл на 2000л воды. Во время обработки необходимо обеспечить хорошую аэрацию. Информация с сайта производителя
Fish is a commodity of potential public health concern as it could contaminated with a wide range of environmentally persistent chemicals, including heavy metals and parasitism. The present study aimed to investigate some of helminth parasites infecting the most of economically important marine fish in Egypt. The collected fish were Anguilla anguilla, Lethrinus lentjan, Pagrus pagrus, Saurida tumbil, Siganus revulatus, Solea solea, and Sparus aurata. The present investigation of parasitic infections was carried out by means of morphologic and morphometric characterization of the isolated parasites using light and scanning electron microscopy. In addition, molecular analyses of parasites SSU rDNA gene sequences and its phylogenetic relationships were applied to detect their exact taxonomy. The role of the recorded parasites as bio-indicators for water pollution was determined by measuring the concentration of some heavy metals (Fe, Zn, Ni, Cu, Cd, and Pb) in parasites and tissues of fish hosts.
Zoonotic parasites are animal parasites that can infect humans especially through contact with contaminated soil. Parasitism is the major health problem both for animals and humans, which constitutes major part of the zoonoses. Most zoonotic parasites are found worldwide, they are more prevalent in tropical and subtropical regions where populations experience poor socioeconomic conditions. The study was conducted to detect the prevalence of some zoonotic parasites from soil samples of different areas in relation to different physical factors such as temperature and humidity in different seasons. The diagnostic techniques such as flotation, centrifugal and sedimentation were used to detect parasites from soil samples. The book will highlight the potential risk of transmission of parasites to humans from the public areas.
Helminthosis is the disease caused by the presence of helminth parasites within or outside the gastrointestinal tract of an individual. All species of animals can be infected with helminth parasites. The infection usually is more severe in the very young and the very old or immuno compromised individuals. Some adult animals can thrive fairly well while infected with some helminth parasites without showing obvious clinical signs while the vast majority suffer reduced productivity under heavy worm burdens. It appears some breeds of animals are more resistant to certain helminth parasites than others. Helminthosis has been a long time standing problem against breeding of fish hosts leading to economic loses that may reach billions of dollars.
The parasites infecting the internal organs of Oreochromis niloticus and Tilapia zillii. It also deals with the impact of these parasites either on the infected tissues or on the whole biology of the fishes under study. The specimens were collected from three different water bodies; the River Nile, El-Foadia stream and El-Mora canal in Sohag. Were examined gills, liver, gonads, spleen and intestine for the parasitic infection. This revealed the presence of eight species of genus Myxobolus, One species related to genus Sphaerospora was described new species, spores related to genus Trichodina were detected in gills, Monogenean and Digenia worms were isolated from Oreochromis niloticus and Tilapia zillii. The impact of parasites was clear on the various tissues and led to the tissue damage and destruction of some of the cell. vary the intensity of the spread of the parasite on the environment in which it resides Fish. There is a clear relationship between the length of the fish and density of parasites in fish.Increased parasite density inside the ovary impacted on fecundity in Fish.
The presence of large number of parasites is dangerous for a fish population, causes great loss of fisheries and fishing industry. Economic aspects of parasitic effects on fishes are mass mortality, weight losses, reduction in fish population and size of catches. Fish disease due to helminth parasites has an indirect and direct effect on the productivity of fish and on human health. The main aim of present work is to provide knowledge about the seasonal variation, intensity of parasitic infection, effect of length and sex on the infestation rate as well as parasitic communities found in this selected species. Overall our result does provide some support of epidemiological predictions. The larger the fish population, the more parasitic species occurs in different organs of the fish. The parasitic community was varied during the whole period of investigation. The differences in parasitic infestation were probably included the interaction of complex and often obscure ecological and physiological mechanism. This information is an important addition to the scientific literature and useful for parasitologists and fish pathologists.
In all over the world fish and its products are taken as food. Besides other sea foods, fish give the world basic supply of high grade protein, not only flesh as well as eggs and air bladder are also the best option for human being. Zoonotically fish transfer several diseases to humans through fish parasites. An immense deal of information on seasonal variation in the incidence and intensity of infection of fish with helminths has been accumulated form surveys and life-cycle studies made to recognize the factors responsible in the life-cycle of intermediate and definitive hosts and parasites. Temperature is an important factor that affects the immense response of the fish host, so indicated that outcome of temperature on the fish is an essential feature for the infestation rate of parasites. In the hot season the infestation rate was high. In some cases both trematodes and the pollutants could act together to cause tumorous growth, but it also appeared that combination of all these aspects has consist of mismanagement of marine resources and lack of enforcement of environmental laws which needed proper attention from the fisheries department and ministry of food and environment.
Over the last few years, study of attachment to confirm the histological impacts induced by some copepods and monogenean parasites of fishes are interest most of parasitologistes. With this present book, it has been satisfactory explanation as to how these parasites attach themselves sufficiently strongly in the gill chamber of their fish hosts to prevent dislodgment by the gill ventilating current. Moreover, this strong attachment of these parasites to their hosts leads to study the mode of attachment and histopathological impacts resulting from this type of attachment.