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Results for “Keratoconjunctivitis, Infectious”

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At least 19 recordsLinked to original sources
PubMed1992

Chlamydial-caused infectious keratoconjunctivitis in bighorn sheep of Yellowstone National Park.

An epizootic of infectious keratoconjunctivitis occurred in bighorn sheep (Ovis canadensis) in Yellowstone National Park during the winter of 1981-82. The causative organism was identified as Chlamydia sp. Mortality related to the epizootic was approximately 60% of an estimated 500 bighorn sheep in the northern range population. The infection probably affected all sex and age classes, but field surveys of live animals and mortality suggested that mature rams died disproportionately. Limited field observations the following winter on individuals having both normal and cloudy-appearing eyes suggested that half of the bighorns then present on the core units of winter range had contracted the disease and survived. By 1988, there were about 300 bighorn sheep in the population.

Animals↗
PubMed1989

Ovine infectious keratoconjunctivitis: a microbiological study of clinically unaffected and affected sheep's eyes with special reference to Mycoplasma conjunctivae.

In a field survey of ovine infectious keratoconjunctivitis, the microbiological flora of 240 clinically unaffected eyes from sheep in 10 flocks was compared with the flora of an equivalent number of clinically affected eyes from 12 natural outbreaks of the disease. Totals of 16 and 17 genera of bacteria were recovered from unaffected and affected eyes, respectively. Staphylococcus, bacillus and branhamella were isolated significantly more often than the other genera of bacteria, in both the unaffected and affected eyes (P less than 0.05). Branhamella ovis and Escherichia coli occurred more frequently in affected eyes, and Staphylococcus aureus occurred more frequently in severely than mildly affected eyes. The genera Mycoplasma and Acholeplasma were isolated from both groups, and Mycoplasma conjunctivae occurred in 92 affected eyes (38.3 per cent), and 27 unaffected eyes (11.3 per cent).

Acholeplasma↗
PubMed1988

The occurrence of Mycoplasma conjunctivae in The Netherlands and its association with infectious keratoconjunctivitis in sheep and goats.

The occurrence of Mycoplasma conjunctivae in the Netherlands is reported for the first time. M. conjunctivae was detected in all five sheep flocks examined with clinical signs of infectious keratoconjunctivitis (IKC) and in none of five sheep flocks without these clinical signs. These observations suggest a primary aetiological role of this organism in IKC in the Netherlands. M. conjunctivae was also detected on a goat farm with clinical signs of IKC. Experiences in culturing this organism are reported. From each sheep flock at least one strain was isolated and characterised in more detail. All Dutch strains, including two strains of M. conjunctivae isolated from sheep milk, as well as type strain HRC 581, formed film and spots which is in contrast with the description of the type strain. All strains, including the type strain, failed to grow in an anaerobic atmosphere generated by GasPak anaerobic system (BBL). Moraxella ovis was detected in nearly all flocks and was apparently not associated with IKC. Mycoplasma arginini was also isolated from ovine eyes.

Animals↗
PubMed1975

Bovine infectious keratoconjunctivitis: carrier state of Moraxella bovis and the development of preventive measures against disease.

Bovine infectious keratoconjunctivitis, which is caused by Moraxella bovis, occurs perennially in all cattle-raising areas. Disease may occur any time during the year but manifests itself often during summer when disease-enhancing factors such as ultraviolet radiation and fly population are increased. Although some recent research findings indicate that cattle can be immunized against the disease, many problems have to be overcome before the cattle industry can benefit from such immunization. Some pressing problems relate to lack of cross-protection between vaccines of different strains of M bovis, resistant or resilient carrier states, and how these factors affect vaccination regimens undertaken. Though cattle vaccinated with 1 strain are somewhat protected against subsequent challange by the same strain, protection against heterologous strains has not been demonstrated. In most herds, cattle harbor M bovis, and these carriers may serve as a source of infection.

Animals↗
PubMed1971

Bovine infectious keratoconjunctivitis: serological aspects of Moraxella bovis infection.

A modification of a gel diffusion precipitin test (GDPT) was used to detect antibodies for Moraxella bovis (M. bovis) in the sera of cattle affected with bovine infectious keratoconjunctivitis (BIK). The test was also used for the detection of sequential antibody development in cattle vaccinated with cultures of M. bovis. Also, strains of M. bovis isolated from cattle herds affected with BIK were characterized serologically as a part of an identification scheme using the test.A comparison of the antigenic properties of various strains of M. bovis and M. bovis-like organisms was conducted using the test. The results indicated that there might be antigenic relationships between M. bovisand M. bovis-like organisms such as Moraxella liquefaciens, Moraxella nonliquefaciens, an unidentified hemolytic diplococcus, Mima polymorpha, Mima polymorpha var. oxidans and Herellea vaginicolaThe authors suggest that the GDPT can be used for serological studies of BIK, and the identification and antigenic analysis of M. bovis. They indicate, however, that a more definitive study is needed to evaluate the reliability of the test for quantitative work.

Animals↗