Seroprevalence of antibodies to chlamydophila abortus shown in awassi sheep and local goats in jordan

Abstract

ABSTRACT:A cold complement fixation test (CFT) was used to identify C. abortus infection in ewes and does in northern Jordan. Sera from 36 flocks of sheep and 20 flocks of goats were collected randomly. The results showed that 433 (21.8%) out of 1 984 ovine sera, and 82 (11.4%) out of 721 caprine sera, were seropositive for C. abortus infection, as indicated by a titre ≥ 1:40. However, all the tested sheep flocks and goat flocks (100%) revealed at least one seropositive animal. There was a strong association (P < 0.05) between the rate of C. abortus infection and the size of the sheep flock, when larger flocks had higher infection rates. However, in goats, the flock size had no relationship with seropositivity. Age had no significant (P > 0.05) impact on C. abortus seropositivity. In sheep, there was a significant difference (P < 0.05) between the rates of the chlamydial infection in the four studied areas of northern Jordan. The highest infection rate in sheep (31.2%) was recorded in Mafraq area, while the rates in Irbid, Ajloun and Jerash were 18.5%, 11.2% and 13.9%, respectively. In goats, there was no significant difference between the rates of the chlamydial infection in the two areas studied. The rates of goat infections were 10.8% and 11.8% in Ajloun and Jerash areas, respectively.

Molecular prevalence of Chlamydia and Chlamydia-like bacteria in Tunisian domestic ruminant farms and their influencing risk factors

“…Our results showed that the risk of contracting Chlamydia increases significantly with the herd size. These results are in agreement with those of other studies, who observed that the prevalence of chlamydial infection was higher in herds with large numbers of animals (Al‐Qudah, Sharif, Raouf, Hailat, & AL‐Domy, ; Merdja et al., ). In general, larger herds might be expected to be associated with intensive management practices that are characteristically more difficult to control and let for closer contact between susceptible and infected animals.…”

Seroprevalence and risk factors associated with Chlamydophila abortus infection in dairy goats in the Northeast of Brazil

“…It has been shown that the reproductive organs of ewes and goats suffering from a latent infection can contain C. abortus even after more than 3 years after the infection (Morgan et al 1988). Lambs and kids delivered by infected animals are generally weak and die a few days after birth (Al-Qudah et al 2004).…”

Prevalence of antibodies to Chlamydophila abortus in ovines in the Londrina area of Paraná state, Brazil

“…Titers below 32 were considered to be non-specific for C. abortus, although they also could have been the result of a mild C. abortus infection. Al-Qudah et al (2004) demonstrated that C. pecorum may be found in the intestines of some ovines without any pathological manifestation but with minimal antibody production compared to C. abortus. False positive results due to vaccination were not considered because the C. abortus vaccine is not available in Brazil.…”