scholarly journals Identification of Mycobacterium avium subspecies paratuberculosis in sheep farms in Bayannaoer, Inner Mongolia, China

2021 ◽  
Author(s):  
yuandi yu ◽  
Suhui Zhang ◽  
Guoyang Xu ◽  
Dengfeng Xu ◽  
Hua Zheng ◽  
...  
Keyword(s):  
Mycobacterium Avium ◽  
Inner Mongolia ◽  
Clinical Symptoms ◽  
Mycobacterium Avium Subspecies Paratuberculosis ◽  
Elisa Test ◽  
Economic Losses ◽  
Serum Samples ◽  
Polymerase Chain ◽  
Mycobacterium Avium Subsp Paratuberculosis

Abstract Background Paratuberculosis, is a widespread chronic infection of Mycobacterium avium subsp. paratuberculosis (Map), causes significant economic losses to the sheep industry. The current study investigated this disease, which causes diarrhea in sheep, particularly, in Bayannaoer, Inner Mongolia. Diagnosis was based on clinical symptoms, pathological autopsy, histopathological inspection, and serological and molecular methods. Results Paratuberculosis was confirmed via a polymerase chain reaction using DNA extracted from tissue and fecal samples. Serum samples from 472 individual sheep were obtained to detect antibodies against MAP by ELISA test and MAP antibodies were separately detected in 17.86% (35/196) and 18.48% (51/276) of sheep herds at 6 months and 1 years of age respectively. The results of tissue lesion and pathological section were consistent with paratuberculosis infection. Conclusions This is the first report of Mycobacterium avium subspecies paratuberculosis seroprevalence in Bayannaoer sheep in Inner Mongolia. Our findings show that MAP was prevalent and potentially threaten in this region and more further investigations on long-term epidemiological

scholarly journals Grass silage contaminated with Mycobacterium avium subspecies paratuberculosis (MAP): a possible source of paratuberculosis infection in ruminants?

2010 ◽  
Vol 55 (No. 5) ◽  
pp. 225-232 ◽  
Author(s):  
JL Khol ◽  
V. Beran ◽  
P. Kralik ◽  
M. Trckova ◽  
I. Pavlik ◽  
...  
Keyword(s):  
Mycobacterium Avium ◽  
Mycobacterium Avium Subspecies Paratuberculosis ◽  
Egg Yolk ◽  
Economic Losses ◽  
Solid Culture ◽  
Chain Reaction ◽  
Grass Silage ◽  
Polymerase Chain ◽  
Mycobacterium Avium Subsp Paratuberculosis ◽  
A Minor

 Mycobacterium avium subsp. paratuberculosis (MAP) is the causative agent of paratuberculosis (Johne's disease) in ruminants. Paratuberculosis can cause severe economic losses and is acknowledged as one of the most important diseases of ruminants today. High amounts of MAP can be shed in the faeces of infected individuals and can survive for a long period in the environment. In the presented trial, baled grass silage was inoculated with a MAP-suspension, and the viability of MAP was studied over time. Samples from the bales were taken at increasing intervals and subsequently tested for the presence of MAP by solid culture on Herrold's Egg Yolk Media (HEYM), liquid culture and real time Polymerase Chain Reaction (PCR) for the IS900 and F57 fragments. No growth of MAP was observed at any time on solid or in liquid cultures, except at the time of inoculation; PCR detections were positive in the majority of the bales. From the results of the presented study, baled grass silage can be classed as a minor risk for the transmission of MAP.

scholarly journals Anti-Chlamydia abortus and Anti-Mycobacterium avium subsp. paratuberculosis Antibodies in Buffaloes in the State of Pernambuco, Brazil

2019 ◽  
Vol 47 (1) ◽  
Author(s):  
Amanda De Noronha Xavier ◽  
Sérgio Alves Do Nascimento ◽  
Tania Alexandra Ortega Sierra ◽  
Pollyane Raysa Fernandes de Oliveira ◽  
Rinaldo Aparecido Mota ◽  
...  
Keyword(s):  
Mycobacterium Avium ◽  
Clinical Signs ◽  
Epidemiological Studies ◽  
Elisa Test ◽  
The State ◽  
Mycobacterium Avium Subsp ◽  
Economic Losses ◽  
Water Buffaloes ◽  
Chlamydia Abortus ◽  
Mycobacterium Avium Subsp Paratuberculosis

Background: The occurrence of economic losses in buffaloes may be related to reproductive problems such as chlamydiosis caused by the bacteria Chlamydia abortus considered as a zoonotic agent; and digestive problems highlighting the infection by Mycobacterium avium subsp. paratuberculosis (Map), responsible for paratuberculosis. There is a little information about these diseases in buffaloes, therefore the aim of this study was to determine the occurrence of anti-Chlamydia abortus and anti- Mycobacterium avium subsp. paratuberculosis (Map) antibodies in water buffaloes in the state of Pernambuco, Brazil.Materials, Methods & Results: The 262 bubaline sera belonging to the serum bank of the Infectious Diseases Laboratory (LIDIC) of the Federal Rural University of Pernambuco (UFRPE) were analyzed. The samples were from nine properties distributed in the municipalities of Agreste and Zona da Mata of the state of Pernambuco. For the detection of anti-Chlamydia abortus and anti-Map antibodies was used a technique of Enzyme immunoabsorption Assay (ELISA) of the IDEXX® by following the manufacturer's instructions. Regarding the detection of anti-Chlamydia abortus antibodies, it was observed that 47.70% (125/262) of the samples were positive. All properties showed at least one positive animal for the investigation of anti-Chlamydia abortus antibodies. It was also verified the occurrence of 7.25% of suspected animals for the investigation of anti-C. abortus antibodies. No positives animals were observed for Map in the bubaline analyzed.Discussion: The occurrence of anti-C. abortus antibodies in buffaloes in the region can be explained by the fact that properties with buffalo breeding has sanitary management that allows the contact between animals, thus increasing the risk of transmission of the agent. In addition, the variation found from 35% to 68.75% may be associated with divergences to the type of management and breeding system used in each property. The percentage of suspected animals may suggest that the number of positive animals is higher or that there were non-specific reactions with other species of Chlamydia, but it is not possible to determine the seroconversion without the accomplishment of paired serology. Because it is a zoonosis, C. abortus may be a risk to the health of the population involved, since the transmission of the bacteria to humans can occur by contact with secretions and excretions of these animals. No positive animals were found for the occurrence of anti-Map antibodies, however, there are reports of the infection identifying animals with clinical signs or properties with a history of the disease, and this may be related to the differences in each property in relation to the history and sanitary management. Moreover, the ELISA test may not be sensitive to the agent depending on the phase of the infection, because if the response is predominantly cellular, the number of antibodies is diminished, making the serological diagnosis difficult. The use of more sensitive tests for the bubaline species can also favor the diagnosis of the infection. Although the occurrence of anti-Map antibodies in the analyzed samples was not detected, it is important to carry out routine epidemiological studies, since the disease has already been registered in water buffaloes in the state of Pernambuco. Considering the occurrence of anti-Chlamydia abortus antibodies it is suggested to conduct studies in order to isolate the agent and verify its real importance in the reproductive disorders of the bubaline species, since this agent causes reproductive losses and has a zoonotic character.

scholarly journals Development and Validation of a Novel ELISA for the Specific Detection of Antibodies against Mycobacterium avium Subspecies paratuberculosis Based on a Chimeric Polyprotein

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Roberto Damián Moyano ◽  
Magali Andrea Romero ◽  
María Alejandra Colombatti Olivieri ◽  
María Fiorella Alvarado Pinedo ◽  
Gabriel Eduardo Traveria ◽  
...  
Keyword(s):  
Mycobacterium Avium ◽  
Roc Curve ◽  
Bovine Serum ◽  
Mycobacterium Avium Subspecies Paratuberculosis ◽  
Cross Reactivity ◽  
Specific Detection ◽  
Serum Samples ◽  
Specific Antigens ◽  
Mycobacterium Avium Subsp Paratuberculosis ◽  
Development And Validation

Bovine paratuberculosis (PTB) is caused by Mycobacterium avium subsp. paratuberculosis (MAP). The optimization of detection tests specific for MAP is crucial to improve PTB control. In this work, we aimed to develop and validate a diagnostic tool based on an ELISA to specifically detect anti-MAP antibodies from bovine serum samples. For that purpose, we designed a recombinant polyprotein containing four specific antigens from MAP and optimized the ELISA. The validation consisted of the assessment of 10 sera from PTB-infected and healthy bovines with different OD values. The diagnostic performance of the polyprotein-ELISA was evaluated by testing 130 bovine serum samples (47 healthy, 48 MAP-infected, and 35 M. bovis-infected bovines). The ELISA using the polyprotein yielded an area under the ROC curve (AUC) of 0.9912 (95% CI, 0.9758–1.007; P  < 0.0001). Moreover, for this ELISA, the cut-off selected from the ROC curve based on the point with a sensitivity of 95.56% (95% CI, 0.8485–0.9946) and specificity of 97.92 (95% CI, 0.8893–0.9995) was 0.3328. Similar results were obtained with an ELISA using the commercial Paratuberculosis Protoplasmatic Antigen (PPA). However, the ELISA with the polyprotein antigen showed a better performance against sera from animals infected with Mycobacterium bovis compared to the ELISA with PPA: lower cross-reactivity (2.85% versus 25.71%). These results demonstrate a very low cross-reactivity of the polyprotein with antibodies present in serum samples from animals infected with M. bovis. The designed polyprotein and the validated ELISA could be very useful for the specific identification of MAP-infected animals in herds.

scholarly journals The Effect of Mycobacterium avium subsp. Paratuberculosis Infection on the Productivity of Cows in Two Dairy Herds with a Low Seroprevalence of Paratuberculosis

Animals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 490 ◽  
Author(s):  
Agnieszka Wiszniewska-Łaszczych ◽  
Katarzyna G. Liedtke ◽  
Joanna M. Szteyn ◽  
Tomasz Lachowicz
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Mycobacterium Avium ◽  
Mycobacterium Avium Subspecies Paratuberculosis ◽  
Dairy Herds ◽  
Lactation Period ◽  
Serum Samples ◽  
Milk Components ◽  
Mycobacterium Avium Subsp Paratuberculosis ◽  
Daily Milk Yield

Paratuberculosis is a chronic, progressive enteritis of ruminants, caused by Mycobacterium avium subspecies paratuberculosis. It affects the productivity of infected dairy cows, causing a reduction in the daily milk yield and basic milk components. The aim of the study was to determine the effect of Mycobacterium avium subspecies paratuberculosis on the productivity of dairy cows in two herds. The research materials were serum and milk samples taken from cows from two naturally infected dairy herds. All serum samples were serologically tested using the Mycobacterium paratuberculosis Antibody ELISA Kit by IDEXX—Screening and Verification. Seroprevalence differed between the herds (5.7% and 11.3%). Seroprevalence varied also between the groups of lactation. The highest seroprevalence was found in the first lactation group in both herds. The milk yield evaluation and analysis of the basic milk components’ content (protein and fat total solids) were tested once a month during one lactation period. The content of the basic milk components varied depending on the lactation group, as well as the serological status of the cows. A decrease in milk yield was observed in cows in herds with a higher seroprevalence (>11%). The largest decrease in milk yield and basic milk components was observed in older animals (>three lactations).

scholarly journals Serological investigation and genotyping of Mycobacterium avium subsp. paratuberculosis in sheep and goats in Inner Mongolia, China

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0256628
Author(s):  
Li Zhao ◽  
Yu Wang ◽  
Jin-Ling Wang ◽  
Wei-Hong Zhao ◽  
Hui-Xin Cheng ◽  
...  
Keyword(s):  
Mycobacterium Avium ◽  
Inner Mongolia ◽  
Histopathological Examination ◽  
Clinical Signs ◽  
Economic Losses ◽  
Pcr Analysis ◽  
Enzyme Analysis ◽  
Restriction Enzyme Analysis ◽  
Serum Samples ◽  
Sheep And Goats

Paratuberculosis a contagious and chronic disease in domestic and wild ruminants, is caused by Mycobacterium avium subspecies paratuberculosis (MAP). Typical clinical signs include intractable diarrhea, progressive emaciation, proliferative enteropathy, and mesenteric lymphadenitis. Paratuberculosis is endemic to many parts of the world and responsible for considerable economic losses. In this study, different types of paratuberculosis and MAP in sheep and goats were investigated in Inner Mongolia, a northern province in China contiguous with two countries and eight other provinces. A total of 4434 serum samples were collected from six cities in the western, central, and eastern regions of Inner Mongolia and analyzed using the ELISA test. In addition, tissue samples were collected from seven animals that were suspected to be infected with MAP. Finally, these tissues samples were analyzed by histopathological examination followed by polymerase chain reaction (PCR), IS1311 PCR-restriction enzyme analysis (PCR-REA), and a sequence analysis of five genes. Among all 4434 ruminant serum samples collected from the six cities in the western, central, and eastern regions of Inner Mongolia, 7.60% (337/4434) measured positive for the MAP antibody. The proportions of positive MAP antibody results for serum samples collected in the western, central, and eastern regions were 5.10% (105/2058), 6.63% (85/1282), and 13.44% (147/1094), respectively. For the seven suspected infected animals selected from the herd with the highest rate of positivity, the gross pathology and histopathology of the necropsied animals were found to be consistent with the pathological features of paratuberculosis. The PCR analysis further confirmed the diagnosis of paratuberculosis. The rest of the results demonstrated that herds of sheep and goats in Inner Mongolia were infected with both MAP type II and type III. To the best of our knowledge, this is the first study of the two subtypes of MAP strains in sheep and goats in Inner Mongolia.

scholarly journals Modelling Bovine Granuloma Formation In Vitro upon Infection with Mycobacterium Avium Subspecies Paratuberculosis

2019 ◽  
Vol 6 (4) ◽  
pp. 80 ◽  
Author(s):  
J. Hunter Rice ◽  
Margaret M. McDaniel ◽  
Alyson Holland ◽  
Shigetoshi Eda
Keyword(s):  
Mycobacterium Avium ◽  
Mycobacterium Avium Subspecies Paratuberculosis ◽  
Clinical Signs ◽  
Host Cells ◽  
Economic Losses ◽  
Multiple Parameters ◽  
Cell Mediated Immune Response ◽  
A Cell ◽  
Vitro Model

Mycobacterium avium subspecies paratuberculosis (Map) causes chronic granulomatous disease in cattle and ruminant livestock, causing substantial economic losses. Current vaccines delay clinical signs but cannot train the immune system to fully eradicate latent Map. During latency, Map uses host defenses, cage-like macrophage clusters called granuloma, as incubators for months or years. We used an in vitro model to investigate the early coordination of macrophages into granuloma upon Map infection over ten days. We found that at multiplicities of infection (MOI; Map:macrophages) of 1:2 and below, the macrophages readily form clusters and evolve pro-inflammatory cytokines in keeping with a cell-mediated immune response. At higher MOIs, viability of host macrophages is negatively impacted. At 1:4 MOI, we quantified viable Map in our model and confirmed that intracellular Map reproduced over the first five days of infection. Host cells expressed Type 1-specific cytokines, and Map-infected macrophages displayed reduced motility compared to Map-exposed, uninfected macrophages, suggesting an important role for uninfected macrophages in the early aggregative response. Reported is the first in vitro JD granuloma model capturing Map and macrophage viability, size distribution of resulting clusters, motility of monocyte-derived macrophages, and cytokine response during clustering, allowing quantitative analysis of multiple parameters of the Map-specific granulomatous response.

scholarly journals Mycobacterium avium Subspecies paratuberculosis DNA and Antibodies in Dairy Goat Colostrum and Milk

2019 ◽  
Vol 6 (4) ◽  
pp. 96 ◽  
Author(s):  
Karianne Lievaart-Peterson ◽  
Saskia Luttikholt ◽  
Maaike Gonggrijp ◽  
Robin Ruuls ◽  
Lars Ravesloot ◽  
...  
Keyword(s):  
Mycobacterium Avium ◽  
Mycobacterium Avium Subspecies Paratuberculosis ◽  
Clinical Signs ◽  
Dairy Goat ◽  
Economic Losses ◽  
Dairy Goats ◽  
Convenience Sample ◽  
Milk Samples ◽  
Zoonotic Risk ◽  
Goat Population

Mycobacterium avium subspecies paratuberculosis (MAP) is endemic in the Dutch dairy goat population causing economic loss, and negatively influencing welfare. Moreover, there are concerns about a potential zoonotic risk. Therefore the industry’s objectives are to decrease MAP prevalence, limit economic losses as well as reduce the concentration of MAP in (bulk) milk. To diminish within-farm spread of infection, vaccination, age dependent group housing with separation of newborns from adults, as well as rearing on artificial or treated colostrum and milk replacers are implemented. However, the importance of MAP contaminated colostrum and milk as a route of infection in dairy goat herds is unknown. Therefore the aim of this study was to detect the presence of MAP DNA in colostrum and milk from dairy goats in infected herds. A convenience sample of 120 colostrum samples and 202 milk samples from MAP infected dairy goat herds were tested by IS900 real-time Polymerase Chain Reaction (PCR) for MAP DNA. Furthermore, 22 colostrum samples and 27 post mortem milk samples of goats with clinical signs consistent with paratuberculosis from known infected herds were tested. The majority of samples were from goats vaccinated against MAP. Positive or doubtful PCR results were obtained in none of the 120 and two of the 22 colostrum samples, and in eight of the 202 and four of the 27 milk samples Negative PCR results were obtained in the remaining 140 (99%) colostrum samples and 217 (95%) milk samples.

scholarly journals Characteristics and Epidemiological Investigation of Paratuberculosis in Dairy Cattle in Tai’an, China

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Zilong Cheng ◽  
Mengda Liu ◽  
Peng Wang ◽  
Peng Liu ◽  
Meng Chen ◽  
...  
Keyword(s):  
Dairy Cattle ◽  
Clinical Symptoms ◽  
Shandong Province ◽  
Chain Reaction ◽  
Serum Samples ◽  
Fatal Disease ◽  
Ionization Time ◽  
Flight Mass Spectrometry ◽  
Subcutaneous Edema ◽  
Polymerase Chain

Paratuberculosis, a chronic and sometimes fatal disease of ruminants, is caused by Mycobacterium avium subsp. paratuberculosis (MAP). In this study, we examined paratuberculosis cases among 2–4-year-old dairy cows at farms in Shandong Province, China. Paratuberculosis cases were diagnosed based on clinical symptoms, pathological autopsy, and histopathological inspection. Characteristics of paratuberculosis in the affected dairy cattle included poor body condition, persistent diarrhea, subcutaneous edema, granulomatous ileitis (multibacillary), mesenteric lymphadenitis, and hepatitis. Acid-fast bacilli from fecal specimens and lymphocytes were putatively identified as MAP based on Ziehl-Neelsen staining, then confirmed using polymerase chain reaction-based testing and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry analyses. Overall, only one MAP strain was isolated from a herd with symptomatic diarrhea. However, analysis of 586 serum samples from nine herds in Tai’an City revealed that 66.7% of herds and 14.2% of animals were seropositive for MAP. Our findings suggest that paratuberculosis is widely prevalent and therefore a significant threat to the dairy industry in Tai’an City, Shandong Province, China.

Disseminated Mycobacterium avium--intracellulare complex infection in a miniature schnauzer

1995 ◽  
Vol 31 (3) ◽  
pp. 213-216 ◽  
Author(s):  
MA Miller ◽  
CE Greene ◽  
AE Brix
Keyword(s):  
Polymerase Chain Reaction ◽  
Mycobacterium Avium ◽  
Mycobacterial Infection ◽  
Nucleic Acid Hybridization ◽  
Chain Reaction ◽  
Cervical Mass ◽  
Mycobacterium Avium Intracellulare ◽  
Polymerase Chain ◽  
Tissue Specimens

A two-year-old, spayed female, miniature schnauzer was evaluated for respiratory distress associated with a compressive cervical mass. Generalized mycobacterial infection was diagnosed from aspirates of several enlarged lymph nodes. Tissue specimens further identified Mycobacterium avium--intracellulare using polymerase chain reaction followed by nucleic acid hybridization. Treatment with enrofloxacin, clofazamine, rifampin, and interferon did not result in long-term success.

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