Aflatoxicosis in poultry: A review. Article (PDF Available) · September with Reads. Cite this publication. Ansuman Mohapatra at. Aflatoxins (AF) are a class of mycotoxins, produced by fungal species of the genus Aspergillus (flavus and parasiticus) and Penicillium puberulum, that are often. Abstract. Poultry has commonly been considered highly susceptible to aflatoxins. However, among domestic fowl there is wide variability in specific species sen.
|Published (Last):||3 October 2016|
|PDF File Size:||18.79 Mb|
|ePub File Size:||17.58 Mb|
|Price:||Free* [*Free Regsitration Required]|
It is still speculative why chickens respond aflatooxicosis this way to dietary exposure to aflatoxins. In parent stocks, there was a decrease in hatchability and poor progeny performance. However, these low levels of mycotoxins may induce subclinical diseases in poultry, which indicated that there is no existing save level for mycotoxins Borutova, Alteration of mycotoxins structure my also occur during feed processing, as in the case of fumonisin reaction with reducing sugars Lu et al.
Supplementing feed aflatoxlcosis absorbents. Aflatpxicosis this organ was very small, rounded, and rubbery which very often complicates with ascites and hydropericardium. Mycotoxicoses should be differentiated from mycoses which are systemic diseases caused by invasion aflatoxicowis growing fungi into living tissues, initiating mechanical destruction.
In this study, a typical hormetic inverted J-shaped dose-response curve was obtained for body weight vs. Clinical signs and pathological lesions related to different mycotoxins Clinical signs and pathological lesion related to mycotoxins are closely related to poultry species, type of mycotoxins, dose ingested, and duration of exposure.
Chickens placed in a hostile environment, such as high temperatures and humidity, poor ventilation, high density, and challenges of other diseases are more susceptible to mycotoxins Naehrer, Poultry ingesting mycotoxin in high concentration may likely suffer from acute or sub-acute disease where toxic effects directly affect specific tissues or organs.
The common clinical signs related to aflatoxicosis in chickens, include decreased feed intake, poor growth and inhomogeneous flocks Figure 1increased mortality, abnormal pigmentation shank, feetfeed passage, and higher feed conversion rate FCR.
Several studies designed to evaluate the effect of aflatoxins in chickens have shown the characteristic low-dose stimulation high-dose inhibition pattern of the hormetic dose-response.
The Common Clinical Signs and Pathological Lesions of Mycotoxicoses in Poultry
The above-cited studies provide evidence for a low-dose stimulation and high-dose inhibition response in aflatoxins in chickens; however, the most relevant evidence for the hormetic response of dietary aflatoxins on body weight in chickens comes from the study of Richardson et al. They have caustic and irritant effects on the skin and mucous membrane Devegowda and Murthy, aflatixicosis Sudden death with head drawn back and feet stretched out behind.
These findings are generally supportive of the examples presented for aflatoxin in chickens and argue for the response being of a more general nature. Higher mycotoxin contamination can be found in crops subjected to stress, such as drought, poor fertilization or excess of water.
The toxic effects of AFB1 are mainly localized in liver as manifested by hepatic necrosis, bile duct proliferation, icterus and hemorrhage.
Email alerts New issue alert. Find me a Vet. Aflatoxicosis represents one of the serious diseases of poultry, livestock and other animals. Aflatlxicosis mycotoxins can cause lipid peroxidation, damage of membrane structures and their functions, induces apoptosis programmed cell aflatoixcosis leading to cellular necrosis Surai,Fink-Gremmels, Mycotoxins carried over at low levels, such as aflatoxins, ochratoxins, T-2 toxins can be aflaoxicosis in the liver, kidney, muscle, and eggs CAST,Volkel et al.
Other lesions commonly found were hemorrhages on the intestinal mucosa, pale or yellow discoloration of the bone marrow, dermal necrosis, vesicular lesions on the feet and legs, and enlargement of costo-chondral joints related to rachitic rosary. Figure 1 shows plots of the data published in the above cited articles Huff, ; Huff et al. In parent stocks, reduction in egg production, enlarged abdomen due to cystic oviduct, enhanced secondary sex characteristics and lowered serum progesterone occurred.
Abstract Poultry has commonly been considered highly susceptible to aflatoxins. Mycotoxicoses are difficult to diagnose because of a great variation in possible symptoms and target organs as well as pathological lesions. Even though poulhry effects of mycotoxins are very complex and there is a great variation in possible symptoms, target organs, and pathological lesions from one mycotoxin to the other Naehrer,presumptive diagnosis can be based on clinical signs, pathological lesions on target organs, especially when moldy ingredients or feed are aflatoxiosis.
Such observations were then generalized to other toxic agents and animal models, suggesting that low doses of stressor agents induce adaptive responses as reflected in accelerated growth poultryy. Increased susceptibility to bruising and heat stress.
AFLATOXICOSIS – Diseases of Poultry – The Poultry Site
In layers and parent stocks, there was regression of ovaries and atrophy of oviduct. Examples of the inverted J-shaped dose-response relationship of body weight vs. This toxigenic fungus is known to produce a group of extremely toxic metabolites, of which aflatoxin B1 AFB1 afflatoxicosis most potent.
In layer chicks, an enlargement ln to local edema of bursa Fabricius Figure 19cystic on the peritoneal surface Figure 20 or within the oviduct were identified.
Field observations have suggested that the most common mycotoxins found in poultry operations in Indonesia, include aflatoxins, trichothecenes, ochratoxins, fumonisins and zearalenone, which all can reduce performance and increase disease incidence in chicken farm operations.
This paper presents the common clinical signs and pathological lesions caused by the most important mycotoxins in the poultry industry in Indonesia. The following section presents the common clinical signs and pathological lesions related to the most frequent mycotoxins sflatoxicosis in poultry operations, especially chicken farms in Indonesia, include aflatoxins, trichotecenes T-2 toxin, DONochratoxin, fumonisins, and zearalenone.
The other consistent lesions in aflatoxicosis were found in bursa Poultrry, thymus, and spleen which appeared smaller than normal Figure 3 ; in male parent stocks, the size of testes was significantly reduced Figure 4. Mycotoxins producing fungi are ubiquitous in nature and under ideal conditions, often contaminate economically important crops in the fields, as well as during their harvest, storage, shipment, and processing.