Seropositive herds were found in Damietta, Port Said and Dakahlia Governorates independent of the herd size (Table1)

Seropositive herds were found in Damietta, Port Said and Dakahlia Governorates independent of the herd size (Table1). == Discussion == Q fever is a common zoonotic disease in most parts of the world with epidemiological data varying from country to another. and Dakahlia Governorates of the Nile delta in both smaller and larger herds. There is a need for further research on the impact of Q fever RITA (NSC 652287) on both veterinary and public health. The results of this study should trigger more detailed epidemiological studies in ruminants as well as investigations into the etiology of atypical pneumonia and fever of unknown origin in humans. Keywords: Coxiella burnetii, Cattle, Egypt, ELISA == Background == Q fever, a zoonotic disease caused byCoxiella burnetii, was first described in Queensland, Australia in 1935, after an outbreak of flu-like illness among slaughter house workers [1]. Since that time, it has been reported in most countries throughout the world [2, 3]. AlthoughCoxiella burnetiihas been shown to infect a number of mammals, domestic ruminants especially sheep and goats are considered the main reservoir and source of human infection [4]. However , dairy cows may also be a source of human infection [2]. The main route of human infection is inhalation of contaminated aerosols, or dust containing bacteria shed by infected animals while milk may also play a role [5, 6]. The clinical manifestations of Q fever in humans are highly variable and range from asymptomatic or mild disease with complete recovery (which probably occurs in most cases) to a variety of clinical signs such as acute flu-like illness, pneumonia, hepatitis and chronic endocarditis leading to inaccurate and delayed diagnosis [2]. In animals, reproductive problems can occur including abortion, stillbirth, retained placenta, infertility, and weak newborns causing severe financial loss to the owner [7]. Asymptomatic and symptomatic animals may releaseCoxiella burnetiiin large quantities at parturition. Shedding can also occur into feces and urine of domestic ruminants which may play role in maintaining and disseminating the agent to the environment. Coxiellae RITA (NSC 652287) can persist in the environment for long periods and may spread for long distances via the RITA (NSC 652287) wind [8]. Coxiella burnetiican also be excreted into the milk of infected animals for many months and even years due to local infection of the mammary gland [9]. The isolation of the pathogen is a reliable diagnostic method, but it remains time-consuming and hazardous [10, 11]. Since there is no characteristic clinical presentation for Q fever, epidemiological investigations mainly rely on serological tools. Hence, ELISA was found to be the method of choice for Q fever seroprevalence studies in man and animals [12]. Although Q fever in man and animals is a notifiable disease in many countries, it remains poorly reported and its surveillance is severely neglected. In Egypt, little information is available regarding Q fever and epidemiological studies are still scarce. Till now, no studies are available regarding the seroprevelance ofCoxiella burnetiiin dairy cattle in Dakahlia, Damietta, and Port Said Governorates, Egypt. We carried out this investigation to estimate the seroprevalence ofCoxiella burnetiiin the cattle populations in the respective regions. == Methods == == The selection criteria and sampling protocol == The present study was conducted according to the principles of good clinical practice, and was approved by the Ethical Committee for Animal Experiments of Mansoura University. The present preliminary serological study included 1, 194 apparently healthy Holstein Friesian dairy cows aged between 2 to 5 years on nine farms located in Dakahlia, Damietta and Port Said Governorates, Egypt (Table1). These Governorates were chosen because convenient farms are located within a radius of 50, 85 and 135 km of Mansoura University (Figure1). Five smaller holdings (less than 200 animals) and four holdings with more than 500 animals were included in the study. Ten ml of blood was collected from each animal through jugular venepuncture using plain tubes and needles. Each blood sample was labeled with the number of the respective animal. The Rabbit Polyclonal to SRPK3 collected blood samples were kept overnight at room temperature to allow blood clotting. On the next day, clear sera were collected and stored in cryotubes at -20C until further examination. The samples were collected during routine brucellosis investigation within the context of the current brucellosis control program in the region and informed consent for the Q fever investigation was given by the owners. == Table 1 . == Summary of cattle farms and ELISA positive samples from three lower Egyptian Governorates in the Nile Delta == Figure 1 . == Map of.