Ocular System

Diplomate, Mary C. Smith Dvm; Sherman, Diplomate Clinical David M.

doi:10.1002/9780813818825.ch6

Cited by 2 publications

(2 citation statements)

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“…Ocular infections in farm animals can cause serious economic loss to farmers [1] [2] [3]. Keratoconjunctivitis is a painful condition that can lead to temporary or permanent eye blindness in sheep.…”

Section: Introductionmentioning

confidence: 99%

“…In the later stages the serous lacrymation may become purulent [4] [5]. Affected animals usually recover within weeks but some remain infected for longer period and this can lead How to cite this paper: Karthik, K., Manimaran, K., Mahaprabhu, R. and Shoba, K. species namely Listeria monocytogenes, Moraxella ovis, Mycoplasma conjunctivae, Chlamydophila pecorum, Coxiella burnetii, etc., were isolated from sheep affected with keratoconjunctivitis [3] [5] [7]. Moraxella bovis was attributed as the cause of infectious keratoconjunctivitis (IBK) in cattle and later findings reported that another agent namely M. bovoculi was also the cause of IBK in cattle [8].…”

Section: Introductionmentioning

confidence: 99%

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Isolation of <i>Moraxella</i> sp. from Cases of Keratoconjunctivitis in an Organized Sheep Farm of India

Karthik¹,

Manimaran²,

Mahaprabhu³

et al. 2017

OJVM

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Keratoconjunctivitis in sheep causes severe ocular irritation thereby reducing the production performance thus causing economic loss to the farmers. Bacterial cause of keratoconjunctivitis in sheep may be due to Listeria monocytogenes, Moraxella ovis, Mycoplasma conjunctivae, etc. An investigation carried out at Tirupathur, Sivagangai district, Tamil Nadu, India revealed keratoconjunctivitis in sheep (population 100 animals). Isolation and identification of eye swabs from ailing animals (n = 5) showed that the bacteria was Moraxella sp. Polymerase chain reaction (PCR) of the isolate was positive for Moraxella sp. Antimicrobial sensitivity testing of the isolate showed that it was sensitive to all antibiotics used in the study. This study reports the presence of Moraxella sp. infection in sheep warranting further studies to know the exact status of this organism so as to prevent keratoconjunctivitis in sheep.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Isolation of <i>Moraxella</i> sp. from Cases of Keratoconjunctivitis in an Organized Sheep Farm of India

Karthik¹,

Manimaran²,

Mahaprabhu³

et al. 2017

OJVM

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The relative importance of phylogeny and habitat in determining the presence and prominence of a granula iridica in hooved mammals

Weyna

Dubielzig

Hennelly

2020

Veterinary Ophthalmology

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PurposeTo investigate the relationship between phylogeny and amount of shade in a species’ habitat regarding the presence or absence of an iridal granula iridica (GI) in a large sample of Artiodactyl and Perissodactyl clades and using online resources.MethodsThe Comparative Ocular Pathology Laboratory of Wisconsin (COPLOW) archives were searched for glass slide material from Artiodactyl (even‐toed) and Perissodactyl (odd‐toed) ungulates. The slides were examined, and the presence or absence of the GI was noted. The phylogenetic tree of the ungulate species was inferred using TimeTree (http://www.timetree.org), and the habitat data are derived from Animal Diversity Web (https://animaldiversity.org/). We assessed the probability of the presence of GI occurring given the amount of shade in a species’ environment using phylogenetic logistic regression.ResultsForty‐eight artiodactyl species were able to be evaluated and tabulated. Nine perissodactyl species were able to be evaluated. The phylogenetic logistic regression showed that the probability of GI presence was lower in artiodactyl species that inhabited shaded environments (βshaded = −1.774). Arctiodacyl species inhabiting a nonshaded environment were slightly more probable to have the GI present (βnonshaded = 0.023), with species inhabitating ambiguously shaded environments having a high probability of GI presence (βambiguous = 2.214).ConclusionsOur results suggest that the GI may be a common morphological feature to shade the pupil in nonshaded environments, and, in its absence, increase the amount of light reaching the retina to improve vision in shaded environments for hooved mammals. Further research on the functional optics of the GI and studies that include additional ungulate species would further elucidate phylogenetic and ecological factors influencing the occurrence of GI in hooved mammals.

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Ocular System

Cited by 2 publications

References 52 publications

Isolation of <i>Moraxella</i> sp. from Cases of Keratoconjunctivitis in an Organized Sheep Farm of India

Isolation of <i>Moraxella</i> sp. from Cases of Keratoconjunctivitis in an Organized Sheep Farm of India

The relative importance of phylogeny and habitat in determining the presence and prominence of a granula iridica in hooved mammals

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Ocular System

Cited by 2 publications

References 52 publications

Isolation of &lt;i&gt;Moraxella&lt;/i&gt; sp. from Cases of Keratoconjunctivitis in an Organized Sheep Farm of India

Isolation of &lt;i&gt;Moraxella&lt;/i&gt; sp. from Cases of Keratoconjunctivitis in an Organized Sheep Farm of India

The relative importance of phylogeny and habitat in determining the presence and prominence of a granula iridica in hooved mammals

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Isolation of <i>Moraxella</i> sp. from Cases of Keratoconjunctivitis in an Organized Sheep Farm of India

Isolation of <i>Moraxella</i> sp. from Cases of Keratoconjunctivitis in an Organized Sheep Farm of India