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05) drop in egg production by 7.81% and 10.28% compared with the control group over 7 wk. https://www.selleckchem.com/products/gsk484-hcl.html Severe lesions in the form of hemorrhagic pneumonia, catarrhal tracheitis, ovarian follicle and oviductal regression, and septicemia were evident on necropsy, demonstrating the pathogenicity of G. anatis as a primary pathogen.Avian chlamydiosis is an infection caused by obligate intracellular, gram-negative bacteria belonging to the Chlamydiaceae family. Birds can be hosts of several Chlamydia species, including Chlamydia avium, which has only been detected in pigeons and psittacine birds. In this study, depression, respiratory distress, and mortality were noted among psittacines belonging to a large aviary with 35 different avian species. On the basis of immunohistochemistry and PCR testing, chlamydiosis was diagnosed in affected birds. Gross and histopathologic lesions were mainly observed in the spleen and gastrointestinal tract. Chlamydia avium was detected in four psittacines by PCR, including two dead birds and two individuals exhibiting respiratory distress. Increased aspartate aminotransferase and lactate dehydrogenase values and anemia were consistently identified in affected birds. Administration of doxycycline, combined with hepatoprotectors and vitamins, was effective in stopping mortality and bacterial shedding.Transmissible viral proventriculitis (TVP) is a disease of chickens, mostly in broilers of 2-8 wk of age. Chicken proventricular necrosis virus (CPNV), a birnavirus, is the etiologic agent. Characteristic gross lesions are enlargement, atony, and pallor of the proventriculus. Cases diagnosed in California between 2000 and 2018 (n = 477), originating from 93 different farms representing all major companies in the region, were analyzed. Frequency of cases varied widely between years, with no recognizable seasonality. The flocks were between 6 and 61 days of age; the average age was 34.0 days, and the median age was 35 days. In 166 cases, between 6.3% and 100% of the submitted birds had gross lesions in the proventriculus. The most common findings were enlarged or dilated proventriculi, thickened walls, and pale or mottled serosal appearance. Histopathologically, inflammation of the glands was the most frequent finding. Other lesions included necrosis, hyperplasia, or both conditions of the glandular epithelium; dilated glands; and occasionally fibrin deposition, fibrosis, and hemorrhages. Twenty-three proventriculi from six cases were tested by immunohistochemistry for the presence of CPNV antigen; 21 stained positive. In 209 cases, birds also had lesions in the bursa fabricii attributed to infectious bursal disease, but with no significant difference in the mean percentage of birds with gross lesions in the proventriculus between cases with or without lesions in the bursa fabricii. The results show that TVP is a common disease of broiler flocks in California and confirms that CPNV is the likely causative agent.Erysipelas is a bacterial disease caused by Erysipelothrix rhusiopathiae that affects multiple mammalian and avian species. In poultry, the disease is of sporadic prevalence and more often observed in older birds, leading to decreased egg production and mortality. Among avian species, turkey breeders seem to be the most affected, but outbreaks have been reported in ducks, layer chickens, quails, geese, and various captive and free-range birds. Sixty-seven cases of erysipelas have been diagnosed in animals submitted for necropsy evaluation at the California Animal Health and Food Safety Laboratory System from January 2000 to December 2019. Of these, 38 cases (56.72%) were in avian species, and a retrospective analysis of these avian cases was performed. The majority of the avian cases were in turkeys (17/38, 44.74%). Most of the turkey breeder cases reported performing artificial insemination prior to the increase in mortality. In other birds, mortality was often observed without observing previous clinical signs. The majority of cases presented with coinfections with other pathogens (23/38, 60.53%), which might have affected the clinical outcome. Despite the occasional occurrence in avian species, erysipelas is an important pathogen in poultry and should be considered as a differential diagnosis in other avian species when acute septicemia is suspected as the cause of mortality.This study was performed to evaluate the diversity and prevalence of yeasts associated with esophageal mycosis in domestic ducks and geese. Fungi were isolated from esophageal lesions of dead animals sent for microbiologic laboratory diagnosis. Species identification using a culture-dependent method was carried out by sequencing of the internal transcribed spacer (ITS)1-5.8S rRNA-ITS2 region. The most frequently isolated yeast was Candida albicans (43.1%) followed by Saccharomyces cerevisiae (17.6%), Candida kefyr (11.7%), Kazachstania bovina (11.7%), Candida lambica (3.9%), and single isolates (1.9%) representing Candida inconspicua, Candida rugosa, Candida pelliculosa, Candida krusei, Magnusiomyces capitatus, and Trichosporon asahii. Our results indicate that a number of potentially pathogenic yeast species can be isolated from esophageal mycosis of waterfowls, but additional studies are needed to make conclusions regarding their possible etiologic role in disease.Mycoplasma gallisepticum (MG) is a major pathogen of the poultry industry throughout the world. MG causes chronic respiratory disease in chickens and infectious sinusitis in turkeys. Despite constant improvements in the biosecurity of the poultry industry in Iran, MG infection still occurs and causes significant economic issues. To evaluate genetic variability, 10 Iranian MG isolates along with 17 available sequences were characterized by gene-targeted sequencing (GTS) analysis of complete mgc2/pvpA genes. According to the findings, 21 different sequence types within the sample set of 27 strains were typed by this method. The discriminatory power of this typing assay was established to be 0.97. Although no insertions and deletions of nucleotides were observed in the mgc2 gene among the Iranian strains, different lengths of pvpA genes with 1086, 1095, and 1101 nucleotides were detected within direct repeats (DRs) 1 and 2. Generally, eight tetrapeptides Pro-Arg-Pro-Met/Gln/Asn were found in the DRs of PvpA. Analysis of the carboxyl ends of PvpA proteins exhibited various repeats of prolines.
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