Investigation of dissemination of aspergillosis in poultry and possible control measures

Abstract

Fungi belonging to genus Aspegillus are ubiquitous saprophytic microorganisms which are, in certain circumstances, responsible for clinical infections of respiratory tract in all poultry, particularly in young birds. In case of a lung form, Aspergillus fumigatus, A. niger and A. glaucus are the most frequently isolated fungi. In general, poultry is constantly exposed to these fungi in its environment. Predisposing factors, such as long exposition and highly contaminated environment and litter, high humidity in poultry houses, poor ventilation, malnutrition and stress, all contribute to clinical aspergillosis. Some geographic and seasonal regularities are observed in relation to the distribution of disease outbreaks. In this sense, cases of aspergillosis in our country were more frequently noted in wild areas located northern from the rivers Sava and Danube. Influence of some factors on the outbreak and spreading, as well as predominant clinical features of aspergillosis in poultry were investigated in this paper. Possible prophylactic and intervention measures were discussed. The occurrence of Aspergillus sp. in poultry was analyzed according to the clinical and laboratory investigations performed during the two selected years, 2000 and 2010. Widespread aspergillosis was noted in poultry flocks of different age, both in young and adult birds. During the years 2000 and 2010, acute aspergillosis was found in 12 and 16 commercial flocks of chickens and turkeys, respectively. Ocular infection with Aspergillus was determined in 10 day old broilers from two flocks. Aspergillus sp. was isolated from unhatched eggs (6.86%), litter (23.07%), environmental (36.17%) and hatchery swabs (3.85%). Besides the appropriate antifungal therapy, enforcement of proper sanitary-hygiene measures on poultry farms and hatcheries, as well as microbiological control of feed are considered essential for an efficient control of infection and its spreading

The Effect of Aspergillus fumigatus Infection on Antibody Immune Response to Newcastle Disease Virus in Broiler Chickens.

“…In the present study, attempts were made to investigate the incidence of avian aspergillosis in commercial broiler farms at Diyala province. A similar incidence was described by Kapetanov et al (2011) who reported the incidence of aspergillosis was more than 70-90% in most countries with tropical climate. Bhattacharya (2003) declared that aspergillosis occurs sporadically in wild birds but commonly in commercial farms.…”

Effects of Season and House Microclimate on Fungal Flora in Air and Broiler Trachea

“…Moulds of the genus Aspergillus are ubiquitous saprophytic microorganisms that induce clinically manifest infections in poultry under specific conditions, primarily involving respiratory system [8]. Aspergillosis is a severe disease in poultry farming all over the world [9], associated with high morbidity and mortality, along with poor feed conversion and weight gain in recovering birds, and carcass condemnation [7,10].…”

Comparative Pathomorphological, Mycological and Molecular Examination of Turkey Poults with Different Immunological Status Experimentally Infected with Aspergillus fumigatus

“…Chronic aspergillosis occurs after prolonged exposure of birds with impaired resistance to A. fumigatus spores. It usually happens in poultry at the age of 13-18 weeks [5][6][7][8]4,9].…”