Showing 9 results for Fallah Mehrabadi
Mh Fallah Mehrabadi , Ar Bahonar, F Zaynolabedini Tehrani , M Vasfi Marandi , A Sadrzadeh, Sa Ghafouri, M Meshkat, F Masror,
Volume 10, Issue 4 (Vol 10, No 4 2015)
Abstract
Background and Objectives : Influenza is an acute, contagious, and zoonotic viral disease. It is caused by a virus of the Orthomyxoviridae family. This very infectious is caused by different subtypes of type A influenza virus in the poultry, turkey, and many other birds. In this study, the serum status of rural domestic poultry was investigated for influenza subtype H9N2.
Methods: This cross sectional study was done from August to October in 2013 in Iranian villages through sampling domestic poultry. The sampling was accidental and was done based on the GIS 11-digit code. In each village, blood samples were taken from at least 28 birds from different species. Then, ELISA was used for screening followed by the HI test. A total of 397 villages and 11546 birds (10145 chickens, 1413 ducks, 397 turkeys, 10 pigeons, and 175 other species) were sampled.
Results : Three hindered and forty nine (88%) out of 397 villages were positive on ELISA. In addition, 341 villages (86%) were positive and 56 (14%) were negative on the HI test for antibody titers. Also, among the considered variables, weather was a risk factor and the prevalence was significantly lower in villages near the rivers, lagoons and lakes (up to a radius of 3 Km).
Conclusion: The high seroprevalence of influenza H9N2 in rural domestic poultry indicates that the disease is becoming endemic. As there is no eradication policy for influenza H9N2 in Iran, using effective vaccines can reduce the infection with influenza virus in domestic and rural poultry.
Mh Fallah Mehrabadi , Ar Bahonar, F Tehrani, M Vasfi Marandi , A Sadrzadeh, M Shabani ,
Volume 12, Issue 1 (Vol 12, No.1 2016)
Abstract
Background and Objectives: Influenza is an acute, highly contagious disease of a variety of both domestic and wild bird species. The aim of this study was to estimate subclinical infections or previous exposure to H5 and H7 subtypes and to discover potentially important determinants of the prevalence of this disease in industrial and backyard poultry in Iran.
Methods: A survey was conducted from September to December 2014 in Iran using a cross-sectional design throughout the entire country. The Enzyme-Linked Immunosorbent Assay (ELISA) was used as the screening test and all ELISA-positive samples were examined with the HI test to differentiate H5 and H7. A total of 1378 places and 31547 birds were sampled.
Results: One place (bird garden) out of 1378 was positive for the H7 subtype and six places (2 bird gardens, 3 villages, and 1 ostrich farm) out of 1378 were positive for the H5 subtype on HI test. The results of this study showed that the presence of a lake (OR=12.20, CI 95% 2.19-68.09) and live bird marketing (11.73, CI 95% 1.32-104.42) were risk factors for the H5 subtype.
Conclusion: Sampling migratory waterfowl birds is recommended for early detection of probable infections and preventing the spread of infection to the backyard and industrial poultry because of their role in the transmission of the disease and probability of circulation of the virus.
F Bagheri Amiri , Ar Bahonar, E Mostafavi, Ma Mansournia, N Rasouli , Mh Fallah Mehrabadi, D Abdollahi, Sholepash,
Volume 12, Issue 1 (Vol 12, No.1 2016)
Abstract
Background and Objectives: Foot-and-mouth disease (FMD) is one of major contagious animal. The purpose of this study was to evaluate the determinants associated with FMD occurrence in farms.
Methods: A case- control study was carried out in cattle farms. The cases were farms with new reports of FMD and controls were units without any report of FMD in last 6 month. For assessing the risk factors, a researcher- made questionnaire was used. Statistical analyses were done with SPSS version 16 using the logistic regression test.
Results: Purchase of new livestock [OR: 14.69 (CI95%: 4.29, 50.36)] and passing migratory livestock [OR: 13.32 (CI 95%: 1.74, 101.87) were identified as the risk factors of the disease. Visiting the farm by the vaccinator in last 2 weeks [OR: 0.17 (CI 95%: 0.05, 0.63)] and buying new livestock from the same village/ city where the farm is located [OR: 0.16 (CI 95%: 0.04, 0.58)] were considered as protective factors.
Conclusion: Considering the role of infected livestock in the country, the most important steps for effective preventation are: areadherence to biosecurity as well as quarantining new purchased animals, and informing and training farmers to not purchase new animals from farms that are located in the infected areas and around the times of outbreak.
S Bokaei, K Absalanfard, Mh Fallah Mehrabadi , H Ebrahimzadeh Mosavi , A Ghajari , N Shahbazian,
Volume 13, Issue 3 (Vol.13, No.3, Atumn 2017)
Abstract
Background and Objectives: In Iran, rainbow trout farms exist in almost all provinces. Viral hemorrhagic septicemia is one of the most important infectious diseases of the rainbow trout which is a serious threat to the farming industry. This study was conducted to investigate outbreaks in 2014 and identify important determinants of the agent entry and disease occurrence in the farms.
Methods: Data were collected using a structured questionnaire and the disease was detected based on clinical signs and laboratory investigations by PCR methods.
Results: During 52 weeks of the study in 2014, 114 of 1140 (12.63%) farms were affected within 78 zones in 14 provinces. In multivariable analysis, illegal entrance of fries (odds ratio: 7.81, 95% CI: 3.63-16.8), illegal entrance of fish (odds ratio: 5.60, 95% CI: 3.03-10.35) and use of river as the water supply (odds ratio: 2.46, 95% CI: 1.51-4.02) were detected as risk factors associated with virus entry and disease outbreak in farms.
Conclusion: Observing biosecurity measures in the farm level, applying risk-based surveillance based on known risk factors, and assessing these factors on a regular basis are important in prevention and control of VHS.
Mm Semironi, M Bahrani, Mh Fallah Mehrabadi , N Ranjbar, K Absalanfard, M Tangestani Makan , Mh Rabiee,
Volume 13, Issue 4 (VOl 13, No.4, Winter 2018)
Abstract
Background and Objectives: Brucellosis is one of the most important zoonosis diseases. The aim was to estimate the seroprevalence of brucellosis in rural cattle, sheep, and goat of Bushehr Province.
Methods: This cross-sectional study was conducted in 2012-2014. For the cattle population, a total of 118 villages and 891 cattle and for sheep and goat population, a total of 202 villages, 526 flocks, 3064 sheep, and 7182 goats were included. Samples were examined with Rose Bengal, 2-mercaptoethanol and wright tests.
Results: In the cattle population, 28 out of 118 villages (20.34%, CI 95%: 13.94%-28.73%) and 20 out of 891 cattle (3.36%, CI 95%:2.28-4.77%) were seropositive. Additionally, in the sheep and goat population, 89 out of 202 villages (44.06%, CI 95%: 37.10%-51.20%), 142 out of 526 flocks (27%, CI 95%: 23.25%-31%), and 335 out of 10246 sheep and goats (3.27%, CI 95%: 2.93%-3.63%) were seropositive.
The prevalence at the individual level of all animals was 3.53%in 2012 which was significantly higher than 2013 ( 2.59%) (P=0.02). Totally, in 3 years, the prevalence of brucellosis in sheep (3.88%) was significantly higher than goats (3%) (P = 0.02) and the prevalence in female animals (3.52%) was significantly higher than male animals (1.58%) (P <0.001).
Conclusion: Due to the reduction of the prevalence, the test and slaughter policy together with the could further reduce and control the spread of the disease in the animal population.
Mh Fallah Mehrabadi, F Tehrani, A Bahonar, A Shoushtari, A Ghalyanchilangeroudi,
Volume 14, Issue 4 (Vol.14, No.4, 2019)
Abstract
Background and Objectives: HPAI has economic and public health importance. Aquatic and shore migratory birds are the main reservoirs and the cause of the spread of viruses across countries. The aim of study was risk assessment of the spread of the avian influenza H5 viruses.
Methods: In this qualitative study, structured interviews and focus group discussions were used to assess the risk of the introduction and spread of highly pathogenic avian influenza viruses (H5-subtypes) into Iran.
Results: Over 300 wetlands, natural and artificial lakes, ponds, and more than 517 bird species (swans, geese, ducks, and coots) are identified in Iran. Weakness in detecting virus entry windows, weakness in passive surveillance of migratory birds, inadequate supervision on hunting of migratory wild birds, movement of hunted birds without any criteria without the control of the Veterinary Organization, inability to monitor the supply of migratory birds in the LBMs, law weaknesses in dealing with offenders, lack of training for people, presence of suitable conditions for close contacts between wild birds and backyard and industrial poultry, and weakness of research on AI in migratory birds were the most important factors influencing the spread of these viruses.
Conclusion: HPAI will be one of the most important challenges for the poultry industry and public health. Solving this challenge requires national determination, overhead organizational views, collaborative and practical cooperation of related organizations, and short and long-term planning based on the realities of the country.
Z Baradaran Seyed , L Pishraft Sabet , Mh Fallah Mehrabadi ,
Volume 15, Issue 1 (Vol.15, No.1 2019)
Abstract
Background and Objectives: Highly pathogenic avian influenza (HPAI) viruses are particularly important due to huge economic consequences and public health concerns. During recent years, because of the severity of epidemics and failure in the control and eradication of HPAI, vaccination has been introduced into the National Prevention and Control Program of some countries, including Iran. This article discusses the role of vaccination in the control of HPAI, the characteristics and constraints of the vaccine, types of commercial vaccines, and previous experiences.
Methods: Scientific databases were searched to collect essential evidence on the role of vaccination in controlling HPAI in a variety of poultry and birds with no time and language restrictions. The articles related to the efficacy and effectiveness of the commercial vaccines on at a national level or population-based studies in some farms were included in present study.
Results: Because of the high pathogenicity and variability of the influenza virus as well as the shortcomings of some commercial vaccines in prevention of virus transmission, vaccination should only be taken into consideration when all other methods of disease control are ineffective. The consequences of the use of vaccines containing the seeds non-antigenically matched with the circulating strains have been reported frequently.
Conclusion: In the national vaccination program, informed policymaking requires evidence based vaccinology that can facilitate development of the national infrastructure with awareness of the limitations of commercial vaccines and the realistic expectations of logistic, financial, and human resources.
K Mirzaie, Ah Shushtari, S Bokaie, Mh Fallah Mehrabadi , Sm Peighambari ,
Volume 16, Issue 4 (Vol.16, No.4 2021)
Abstract
Background and Objectives: Avian influenza (AI) is one of the most important respiratory diseases in the poultry industry that causes huge economic impacts and plays an important role in public health. H9N2 Avian Influenza Virus (H9N2 AIV) has a broad circulation and causes endemic infections in the poultry industry of the country.
Methods: A cohort study was conducted from July 2016 to November 2017 in broiler chicken farms of Qazvin Province, Iran to detect H9N2 AIV infection determinants in broiler chicken farms.
Results: Sixteen out of 34 units that were included in the study had positive PCR results. Some variables such as “type of fence around the unit”, “biosecurity”, “cooling system status”, “mean maternal antibody titers”, “location height”, “proximity to public traffic lanes” and “number of units within a radius of 1 km” had significant effects on the infection occurrence in poultry units according to univariate statistical analyses (P<0.05). However, only two of them (“biosecurity” and “cooling system status”) were statistically significant in multi-variable analyses (P<0.05).
Conclusion: Biosecurity measures should be implemented more seriously and strictly in broiler farms to reduce the impact of H9N2 AIV infection.
Mh Rabiee, H Akbarin, S Bokaie, Mh Fallah Mehrabadi , A Sadrzadeh, F Tehrani,
Volume 17, Issue 1 (Vol 17,No.1, Spring 2021 2021)
Abstract
Background and Objectives: The commercial layer chicken farming is one of the most important sectors of the poultry industry. This study was conducted to evaluate the status of biosecurity of commercial layer chicken farms in 9 Iranian provinces with the highest layer chicken population.
Methods: In this cross-sectional study, 202 commercial layer chicken farms were selected from nine Iranian provinces in 2019 using stratified random sampling. Then, the required data were collected using a questionnaire by presenting to the farms in person. The results are expressed as mean, standard variation, sum and adoption rate index.
Results: The results showed that the adoption level of total biosecurity measures was 68.18% in the commercial layer chicken farms in Iran. This figure was 72.11%, 75% and 60.82% for conceptual, structural and operational biosecurity measures, respectively. Among conceptual biosecurity measures, the lowest adoption level (29.20%) was for distance to the nearest garden and agriculture land. Among structural biosecurity measures, the lowest adoption level (28.96%) was for a hand disinfection spot before shed. Among the operational biosecurity measures, the lowest adoption level was for water filtrations (31.18%) and microbial testing of water (33.91%).
Conclusion: This study investigated the biosecurity status of commercial layer chicken farms in nine Iranian provinces with the highest layer chicken population and revealed some weaknesses in the implementation of these measures at conceptual, structural and operational levels.
