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\n <\/a>\n <\/div><\/p>\nPoultry Diseases<\/h2><\/div>- All<\/a><\/li>
- A<\/a><\/li>
- B<\/a><\/li>
- C<\/a><\/li>
- D<\/a><\/li>
- E<\/a><\/li>
- F<\/a><\/li>
- G<\/a><\/li>
- H<\/a><\/li>
- I<\/a><\/li>
- M<\/a><\/li>
- N<\/a><\/li>
- O<\/a><\/li>
- P<\/a><\/li>
- R<\/a><\/li>
- S<\/a><\/li>
- T<\/a><\/li><\/ul><\/div><\/div>A<\/div>
- Acute Death Syndrome<\/a><\/li>
- Aflatoxicosis<\/a><\/li>
- Ascites<\/a><\/li>
- Aspergillosis<\/a><\/li>
- Avian Mycoplasmosis<\/a><\/li><\/ul><\/div><\/div>B<\/div>
- Blackhead<\/a><\/li>
- Bronchitis - Infectious<\/a><\/li>
- Bumblefoot<\/a><\/li><\/ul><\/div><\/div>C<\/div>
- Calcium and Phosphorus Deficiency<\/a><\/li>
- Cannibalism<\/a><\/li>
- Chronic Respiratory Disease<\/a><\/li>
- Coccidiosis<\/a><\/li>
- Crop Impaction<\/a><\/li><\/ul><\/div><\/div>D<\/div>
- Dermanyssus gallinae<\/a><\/li>
- Duodenal Dropsy<\/a><\/li><\/ul><\/div><\/div>E<\/div>
- Eimeria in Chickens<\/a><\/li>
- Enterohepatitis<\/a><\/li><\/ul><\/div><\/div>F<\/div>
- Favus<\/a><\/li>
- Feather Pecking<\/a><\/li>
- Flip Over<\/a><\/li>
- Foot Burn<\/a><\/li>
- Foot Lesions<\/a><\/li>
- Footpad Dermatitis<\/a><\/li><\/ul><\/div><\/div>G<\/div>
- Gapes<\/a><\/li>
- Gizzard Impaction<\/a><\/li>
- Grass Impaction<\/a><\/li>
- Gumboro<\/a><\/li><\/ul><\/div><\/div>H<\/div>
- Helminthiasis<\/a><\/li>
- Histomoniasis<\/a><\/li><\/ul><\/div><\/div>I<\/div>
- Infectious Bronchitis<\/a><\/li>
- Infectious Bursal Disease<\/a><\/li>
- Infectious Enterohepatitis<\/a><\/li><\/ul><\/div><\/div>M<\/div>
- Microsporum gypseum<\/a><\/li>
- Mites<\/a><\/li>
- Mycoplasmosis<\/a><\/li><\/ul><\/div><\/div>N<\/div>
- Northern Fowl Mite<\/a><\/li><\/ul><\/div><\/div>O<\/div>
- Ornithonyssus sylvarum<\/a><\/li>
- Osteoporosis<\/a><\/li><\/ul><\/div><\/div>P<\/div>
- Pododermatitis<\/a><\/li><\/ul><\/div><\/div>R<\/div>
- Red Poultry Mite<\/a><\/li><\/ul><\/div><\/div>S<\/div>
- Scaly Leg Mite<\/a><\/li>
- Sudden Death Syndrome<\/a><\/li>
- Syngamus trachea<\/a><\/li><\/ul><\/div><\/div>T<\/div>
- Trichophyton megninii<\/a><\/li><\/ul><\/div><\/div><\/div><\/div>\n
Coccidiosis in Poultry<\/h4>\n
Also known as: Eimeria<\/strong><\/em><\/p>\n\nCoccidiosis is an intestinal disease caused by intracellular protozoal parasites (Allen and Fetterer, 2002<\/a>). Coccidiosis occurs when pathogenic populations of the causative agent rapidly\u00a0build up. Most coccidia in poultry belong to the genus\u00a0Eimeria<\/em>, which are highly host-specific. There are seven pathogenic <\/a><\/span> species of Eimeria<\/em> affecting chickens, five affecting turkeys and one affecting ducks.<\/strong><\/p>\n<\/a>Although there may be some differences between poultry management systems regarding the degree of risk from coccidia, it is generally accepted that the disease may be found in most systems, both indoor and outdoor.<\/strong><\/p>\n<\/div>\n<\/div>\n\nCoccidian Lifecycle<\/a>
\nControl and Prevention<\/a>
\nVaccines for Coccidiosis<\/a>
\nTreatment Options<\/a>
\nGood Practice<\/a>\n<\/div>\n<\/div>\nLife cycle of Coccidia<\/h3>\n
The life-cycle is rapid, approximately 4-5 days, and involves massive multiplication from ingestion of a single infective oocyst<\/a><\/span>. Both infected and recovered birds shed oocysts. Under conditions of 25-30\u02daC, this takes 1-2 days. Sporulated oocysts have the ability to survive outside the host for very long periods. Since sporulation does not occur below 12\u02daC or above 39\u02daC, during winter months spores may remain dormant. Sporulation can continue when temperatures increase, although prolonged periods at low temperatures can destroy the viability of the oocytes. This may be an important factor for outdoor poultry systems. From: (Fanatico, 2006<\/a>)<\/p>\n<\/p>\n![\"Coccidiosis](\"https:\/\/www.farmhealthonline.com\/wp-content\/uploads\/2015\/09\/Coccidiosis-in-poultry-300x223.jpg\")
<\/a>Eimeria<\/em> lifecycle in poultry<\/strong><\/p><\/div>\n<\/span><\/p>\n
\n- The life-cycle is short and starts with the bird\u00a0ingesting\u00a0sporulated oocysts<\/a><\/span><\/li>\n
- The sporulated oocysts contain four sporocysts, each containing two sporozoites and the mechanical and\u00a0acidic environment\u00a0<\/strong>in the gut result in the release of these sporocysts and sporozoites into the gut.<\/li>\n
- The sporozoites invade the duodenal mucosa epithelial<\/a><\/span> cells before undergoing phases of growth and multiplication with periodic release of merozoites into the gut.<\/li>\n
- Merozoites develop within the duodenal cells as gametes, in the form of both macro- and microgametocytes<\/li>\n
- These develop into a zygote and then an oocyst which is shed in the feces<\/li>\n
- These oocysts require moist conditions to undergo sporulation, a process that requires oxygen and takes about 24 hours, at which point they become infective.<\/li>\n<\/ol>\n
Symptoms and Pathology of Coccidiosis<\/h3>\n
Typically, the disease is seen in birds of 3-6 weeks old, before they have acquired immunity. Infected birds will have ruffled feathers, and a breakdown in intestinal function is the first recognizable symptom of coccidiosis, blood in the droppings may be observed depending on the strain of coccidia affecting the bird. The extent of the pathogenicity depends on the species of parasite, numbers of infective (sporulated) oocysts in the environment and the age and susceptibility of the birds. The most virulent strains will cause diarrhea and a sudden increase in flock mortality. Less virulent strains will result in poor growth and reduced feed efficiency. There is normally a reduction in feed and water intake (Williams, 1996<\/a>). Hence, the losses resulting from coccidiosis are variable.<\/p>\n<\/p>\n![\"Indoor](\"https:\/\/www.farmhealthonline.com\/wp-content\/uploads\/2015\/09\/Indoor-birds-2-300x200.jpg\")
<\/a>Most scientific knowledge on coccidiosis has been obtained from chickens\u00a0as it is in commercial poultry that this parasite causes the most damage due to the fact that birds are reared together in large numbers and high densities (Peek and Landman, 2011<\/a>).<\/strong><\/p><\/div>\n<\/span>Coccidiosis rarely occurs in layers and breeders as they have generally acquired immunity to this disease, although in situations where there is an immunity breakdown all pathogenic Eimeria<\/em> species may cause an abrupt and severe drop in egg production for three to six weeks. Any recovery from severe infection can take 10-14 days, and it takes longer to reach pre-infection production status.<\/p>\nThere is likely to be variation within a flock with regard to the response to infection. Within a single infected group there will be individuals dying whilst others will remain healthy. Sub-clinical infection may mean that some birds will take longer to eat, and as a result may become stunted. This will result in uneven groups, which can cause marketing problems in table-bird flocks.<\/p>\n
The most common form of the disease is cecal coccidiosis, caused by Eimeria tenella<\/em>. This normally occurs between 4 and 6 weeks of age. A small but sudden rise in mortality may occur and dead birds will have an anemic<\/a><\/span> appearance. The outbreak tends to occur amongst a single group or house. It is very important to treat when the disease is first seen.<\/p>\nTissue damage and changes in the intestinal tract, as a consequence of infection, may allow colonization by other harmful bacteria, such as Salmonella typhimurium<\/em>, or Clostridium perfringens<\/em>, which causes necrotic enteritis (Van Immerseel et al., 2004<\/a>).<\/p>\nCoccidiosis may be diagnosed at post-mortem by the presence of characteristic lesions in the intestinal tract, although rapid changes in the intestine more than one hour after death may not allow easy identification. Microscopic examination may reveal the presence of oocysts, but not necessarily indicate clinical disease.\u00a0Fecal egg counts can be used to detect coccidial oocysts, however high levels may be seen in dung samples without disease being present.<\/p>\n
Classification of Eimeria<\/em><\/h3>\n
- All<\/a><\/li>
- A<\/a><\/li>
- B<\/a><\/li>
- C<\/a><\/li>
- D<\/a><\/li>
- E<\/a><\/li>
- F<\/a><\/li>
- G<\/a><\/li>
- H<\/a><\/li>
- I<\/a><\/li>
- M<\/a><\/li>
- N<\/a><\/li>
- O<\/a><\/li>
- P<\/a><\/li>
- R<\/a><\/li>
- S<\/a><\/li>
- T<\/a><\/li><\/ul>
<\/div><\/div>A<\/div>- Acute Death Syndrome<\/a><\/li>
- Aflatoxicosis<\/a><\/li>
- Ascites<\/a><\/li>
- Aspergillosis<\/a><\/li>
- Avian Mycoplasmosis<\/a><\/li><\/ul>
<\/div><\/div>B<\/div>- Blackhead<\/a><\/li>
- Bronchitis - Infectious<\/a><\/li>
- Bumblefoot<\/a><\/li><\/ul>
<\/div><\/div>C<\/div>- Calcium and Phosphorus Deficiency<\/a><\/li>
- Cannibalism<\/a><\/li>
- Chronic Respiratory Disease<\/a><\/li>
- Coccidiosis<\/a><\/li>
- Crop Impaction<\/a><\/li><\/ul>
<\/div><\/div>D<\/div>- Dermanyssus gallinae<\/a><\/li>
- Duodenal Dropsy<\/a><\/li><\/ul>
<\/div><\/div>E<\/div>- Eimeria in Chickens<\/a><\/li>
- Enterohepatitis<\/a><\/li><\/ul>
<\/div><\/div>F<\/div>- Favus<\/a><\/li>
- Feather Pecking<\/a><\/li>
- Flip Over<\/a><\/li>
- Foot Burn<\/a><\/li>
- Foot Lesions<\/a><\/li>
- Footpad Dermatitis<\/a><\/li><\/ul>
<\/div><\/div>G<\/div>- Gapes<\/a><\/li>
- Gizzard Impaction<\/a><\/li>
- Grass Impaction<\/a><\/li>
- Gumboro<\/a><\/li><\/ul>
<\/div><\/div>H<\/div>- Helminthiasis<\/a><\/li>
- Histomoniasis<\/a><\/li><\/ul>
<\/div><\/div>I<\/div>- Infectious Bronchitis<\/a><\/li>
- Infectious Bursal Disease<\/a><\/li>
- Infectious Enterohepatitis<\/a><\/li><\/ul>
<\/div><\/div>M<\/div>- Microsporum gypseum<\/a><\/li>
- Mites<\/a><\/li>
- Mycoplasmosis<\/a><\/li><\/ul>
<\/div><\/div>N<\/div>- Northern Fowl Mite<\/a><\/li><\/ul><\/div><\/div>O<\/div>
- Ornithonyssus sylvarum<\/a><\/li>
- Osteoporosis<\/a><\/li><\/ul>
<\/div><\/div>P<\/div>- Pododermatitis<\/a><\/li><\/ul><\/div><\/div>R<\/div>
- Red Poultry Mite<\/a><\/li><\/ul><\/div><\/div>S<\/div>
- Scaly Leg Mite<\/a><\/li>
- Sudden Death Syndrome<\/a><\/li>
- Syngamus trachea<\/a><\/li><\/ul>
<\/div><\/div>T<\/div>- Trichophyton megninii<\/a><\/li><\/ul><\/div><\/div><\/div><\/div>\n
Coccidiosis in Poultry<\/h4>\n
Also known as: Eimeria<\/strong><\/em><\/p>\n
\nCoccidiosis is an intestinal disease caused by intracellular protozoal parasites (Allen and Fetterer, 2002<\/a>). Coccidiosis occurs when pathogenic populations of the causative agent rapidly\u00a0build up. Most coccidia in poultry belong to the genus\u00a0Eimeria<\/em>, which are highly host-specific. There are seven pathogenic <\/a><\/span> species of Eimeria<\/em> affecting chickens, five affecting turkeys and one affecting ducks.<\/strong><\/p>\n<\/a>Although there may be some differences between poultry management systems regarding the degree of risk from coccidia, it is generally accepted that the disease may be found in most systems, both indoor and outdoor.<\/strong><\/p>\n
<\/div>\n<\/div>\n\nCoccidian Lifecycle<\/a>
\nControl and Prevention<\/a>
\nVaccines for Coccidiosis<\/a>
\nTreatment Options<\/a>
\nGood Practice<\/a>\n<\/div>\n<\/div>\nLife cycle of Coccidia<\/h3>\n
The life-cycle is rapid, approximately 4-5 days, and involves massive multiplication from ingestion of a single infective oocyst<\/a><\/span>. Both infected and recovered birds shed oocysts. Under conditions of 25-30\u02daC, this takes 1-2 days. Sporulated oocysts have the ability to survive outside the host for very long periods. Since sporulation does not occur below 12\u02daC or above 39\u02daC, during winter months spores may remain dormant. Sporulation can continue when temperatures increase, although prolonged periods at low temperatures can destroy the viability of the oocytes. This may be an important factor for outdoor poultry systems. From: (Fanatico, 2006<\/a>)<\/p>\n
<\/p>\n
<\/a>Eimeria<\/em> lifecycle in poultry<\/strong><\/p><\/div>\n
<\/span><\/p>\n
- \n
- The life-cycle is short and starts with the bird\u00a0ingesting\u00a0sporulated oocysts<\/a><\/span><\/li>\n
- The sporulated oocysts contain four sporocysts, each containing two sporozoites and the mechanical and\u00a0acidic environment\u00a0<\/strong>in the gut result in the release of these sporocysts and sporozoites into the gut.<\/li>\n
- The sporozoites invade the duodenal mucosa epithelial<\/a><\/span> cells before undergoing phases of growth and multiplication with periodic release of merozoites into the gut.<\/li>\n
- Merozoites develop within the duodenal cells as gametes, in the form of both macro- and microgametocytes<\/li>\n
- These develop into a zygote and then an oocyst which is shed in the feces<\/li>\n
- These oocysts require moist conditions to undergo sporulation, a process that requires oxygen and takes about 24 hours, at which point they become infective.<\/li>\n<\/ol>\n
Symptoms and Pathology of Coccidiosis<\/h3>\n
Typically, the disease is seen in birds of 3-6 weeks old, before they have acquired immunity. Infected birds will have ruffled feathers, and a breakdown in intestinal function is the first recognizable symptom of coccidiosis, blood in the droppings may be observed depending on the strain of coccidia affecting the bird. The extent of the pathogenicity depends on the species of parasite, numbers of infective (sporulated) oocysts in the environment and the age and susceptibility of the birds. The most virulent strains will cause diarrhea and a sudden increase in flock mortality. Less virulent strains will result in poor growth and reduced feed efficiency. There is normally a reduction in feed and water intake (Williams, 1996<\/a>). Hence, the losses resulting from coccidiosis are variable.<\/p>\n
<\/p>\n
<\/a>Most scientific knowledge on coccidiosis has been obtained from chickens\u00a0as it is in commercial poultry that this parasite causes the most damage due to the fact that birds are reared together in large numbers and high densities (Peek and Landman, 2011<\/a>).<\/strong><\/p><\/div>\n
<\/span>Coccidiosis rarely occurs in layers and breeders as they have generally acquired immunity to this disease, although in situations where there is an immunity breakdown all pathogenic Eimeria<\/em> species may cause an abrupt and severe drop in egg production for three to six weeks. Any recovery from severe infection can take 10-14 days, and it takes longer to reach pre-infection production status.<\/p>\n
There is likely to be variation within a flock with regard to the response to infection. Within a single infected group there will be individuals dying whilst others will remain healthy. Sub-clinical infection may mean that some birds will take longer to eat, and as a result may become stunted. This will result in uneven groups, which can cause marketing problems in table-bird flocks.<\/p>\n
The most common form of the disease is cecal coccidiosis, caused by Eimeria tenella<\/em>. This normally occurs between 4 and 6 weeks of age. A small but sudden rise in mortality may occur and dead birds will have an anemic<\/a><\/span> appearance. The outbreak tends to occur amongst a single group or house. It is very important to treat when the disease is first seen.<\/p>\n
Tissue damage and changes in the intestinal tract, as a consequence of infection, may allow colonization by other harmful bacteria, such as Salmonella typhimurium<\/em>, or Clostridium perfringens<\/em>, which causes necrotic enteritis (Van Immerseel et al., 2004<\/a>).<\/p>\n
Coccidiosis may be diagnosed at post-mortem by the presence of characteristic lesions in the intestinal tract, although rapid changes in the intestine more than one hour after death may not allow easy identification. Microscopic examination may reveal the presence of oocysts, but not necessarily indicate clinical disease.\u00a0Fecal egg counts can be used to detect coccidial oocysts, however high levels may be seen in dung samples without disease being present.<\/p>\n
Classification of Eimeria<\/em><\/h3>\n
- The sporulated oocysts contain four sporocysts, each containing two sporozoites and the mechanical and\u00a0acidic environment\u00a0<\/strong>in the gut result in the release of these sporocysts and sporozoites into the gut.<\/li>\n
- The life-cycle is short and starts with the bird\u00a0ingesting\u00a0sporulated oocysts<\/a><\/span><\/li>\n
- Sudden Death Syndrome<\/a><\/li>
- Scaly Leg Mite<\/a><\/li>
- Red Poultry Mite<\/a><\/li><\/ul>
- Osteoporosis<\/a><\/li><\/ul>
- Ornithonyssus sylvarum<\/a><\/li>
- Mites<\/a><\/li>
- Infectious Bursal Disease<\/a><\/li>
- Histomoniasis<\/a><\/li><\/ul>
- Gizzard Impaction<\/a><\/li>
- Feather Pecking<\/a><\/li>
- Enterohepatitis<\/a><\/li><\/ul>
- Duodenal Dropsy<\/a><\/li><\/ul>
- Cannibalism<\/a><\/li>
- Bronchitis - Infectious<\/a><\/li>
- Aflatoxicosis<\/a><\/li>
- A<\/a><\/li>