Abstract
A sheep flock contains 600 head of Al-Barky ewes suffered from: Icterus, bloody urine, death two days post symptoms appearance and abortion in 6 pregnant ewes. Thesymptoms appeared on 46 case and 6 ewes aborted and mortality rate was44 case dead. The results of examined samples showed that the isolation of leptospira from 5 out of 52 (9.62 %) animals samples (blood, urine and necropsy kidney tissue samples), the isolates were 2 from blood samples (6.7 %), 2 from kidney samples (6.7 %) and 1 from urine samples (10 %). The obtained leptospira isolates from infected ewes were examined by PCR for identification of leptospires, using universal primers set (lig1 / lig2,) that amplify the genomic DNA of all pathogenic Leptospiraserovar only, the most predominant seropositivity using MAT was detected against L.int.icterohaemorrhagiae (57.69%), followed by L.int.grippotyphosa (28.85%) and L.int.pomona (13.46%). The highest titer of seropositivity was detected against serovarL.int.icterohaemorrhagiae (1:1600) while L.int.grippotyphosa and L.int.pomona reached up to (1:400).
Highlights
Leptospirosis is the most wide spread zoonosis worldwide; it is present in all continents except Antarctica and evidence for the carriage of Leptospira has been found in virtually all mammalian species examined
Few studies were conducted on the diagnosis and control of small ruminants' leptospirosis
The aim of the present work was to study the prevalence of leptospirosis in Egyptian sheep flock suffering from abortion and death
Summary
Leptospirosis is the most wide spread zoonosis worldwide; it is present in all continents except Antarctica and evidence for the carriage of Leptospira has been found in virtually all mammalian species examined. Humans most commonly become infected through occupational, recreational, or domestic contact with the urine of carrier animals, either directly or via contaminated water or soil. The epidemiology of leptospirosis involves kidney colonization of a primary (maintenance) host and a secondary host. Primary hosts are often asymptomatic while secondary hosts in most cases will show signs of disease. Both primary and secondary hosts shed leptospires in urine and can transmit the disease to other animals or humans, human to human cases are rarely reported (Levett, 2001). Chronic leptospirosis can cause abortion, stillbirth, and infertility. Often chronically infected animals remain as asymptomatic carriers for life with the organism localized in the kidneys and in the reproductive organs. In sheep the disease causes high economic loss due to abortion, stillbirth and decreased milk production (Ciceroni et al, 2000)
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