The tonsillar carriage of Pasteurella haemolytica in lambs

Al-Sultan, Imad Ibrahim Ali; Aitken, I.D.

doi:10.1016/0021-9975(85)90005-2

Cited by 33 publications

(14 citation statements)

References 8 publications

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“…This is clear evidence that the organism was transmitted from the lambs to the teat ducts. Given that Al‐Sultan and Aitken (1984) have reported tonsilar carriage of M. haemolytica in up to 100% of healthy lambs, the most probable source of the organism would be the upper respiratory tract of the lambs. This finding confirms the initial hypothesis previously presented by Scott and Jones (1998) and Jones and Watkins (2000).…”

Section: Discussionmentioning

confidence: 99%

Effects of Lamb Sucking on the Bacterial Flora of Teat Duct and Mammary Gland of Ewes

Gougoulis

Kyriazakis

Tzora

et al. 2007

Reprod Domestic Animals

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We aimed (i) to determine differences in bacterial flora of teat duct and mammary gland of ewes before and after suckling, (ii) to evaluate factors potentially affecting those. We collected samples of teat duct material and mammary secretion from 11 ewes immediately before and after sucking by lambs, as well as 120 min later. We processed samples bacteriologically and compared changes in infection by the Sign Test. We isolated bacteria from 3.5% duct and 1.5% secretion samples before suckling. Respective figures post-suckling were 10.6% and 2.0%, and 120 min later 6.8% and 1.5%. We recorded differences in infection of duct samples before and after suckling in 40 cases; bacteria were isolated before suckling from six samples, whereas after it from 34 (p < 0.001). Also, we recorded differences in samples collected after suckling and 120 min later in 12 cases; bacteria were isolated immediately post-suckling from eight samples, whereas 120 min later from four (p = 0.375). No significant changes were seen for secretion. We found neither difference between ewes with single or twin lambs, nor among stages of lactation. Mostly, we isolated staphylococci: 70% of isolates before suckling, 80% of isolates after it, 91% of isolates 120 min later. After suckling we also isolated two Mannheimia haemolytica strains. Suckling predisposes to entrance of bacteria into the teat; however, increased teat infections did not result in mammary infections. Isolation of M. haemolytica post-suckling indicates that lambs act as source of infection for this pathogen.

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Section: Discussionmentioning

confidence: 99%

Effects of Lamb Sucking on the Bacterial Flora of Teat Duct and Mammary Gland of Ewes

Gougoulis

Kyriazakis

Tzora

et al. 2007

Reprod Domestic Animals

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“…Apparently healthy sheep may harbor pathogens like Salmonella sp. and Pasteurella hemolytica in their tonsils [5,46]. Tonsils have gained increasing interest over the last decade, since testing for scrapie was intensified and PrPsc accumulation has been reported in lymphoid tissues including tonsils early, in preclinical disease [115,124].…”

Section: Role Of Tonsils In Infectionmentioning

confidence: 99%

“…"M" is the abbreviation for "membranous" cell, since the apical cytoplasma of these cells is often reduced to a thin membrane, or "microfold bearing" cell, since microfolds have been described in M cells of non-human primates. 5. Antigen sampling occurs through the LE by M cells or dendritic cells.…”

Section: Introductionmentioning

confidence: 99%

MALT structure and function in farm animals

2006

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-Mucosa-associated lymphoid tissue (MALT) is defined as an organized lymphoid tissue in the mucosa that samples antigens. The morphological characteristics that distinguish MALT from lymphoid infiltrates are discussed. MALT has been extensively investigated in laboratory animals, while knowledge in cattle, sheep, goats, pigs and horses that are summarized under the term farm animals in this review is fragmentary. Literature data about the distribution, morphology, function and involvement in infectious diseases of MALT in farm animals are described. The understanding of specific features of MALT in other species than laboratory animals is important for comparative research, in order to understand pathological and immunological processes in the respective species and as a potential route of vaccination of mucosal surfaces.

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“…In other reports, were reported M. haemolytica was isolated from sheep in Baghdad in (8.57%), whereas, M. haemolytica A serotype was isolate in (21.22%), while T serotype was isolated in (78.78%) [9]. Subsequently, the increase in the age of lambs accompanied by increase serotype T and decreases in serotype A [10]. As well as M. haemolytica isolated during an outbreak in mountain goat, deer and gazalles, the prevalence rate of the pathogen from nasopharyngeal swabs and blood samples was (68.0%) and (3.17%) respectively, while the prevalence rate of serotype A was (48%) and serotype T was (16%) [11].…”

mentioning

confidence: 99%

Molecular and Phenotypical Characterization of <i>Mannheimia haemolytica</i> Isolated from Goats in Baghdad Province

Ahmed¹,

Mohammed²,

Khalaf³

2017

AiM

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Mannheimia haemolytica (M. haemolytica) is a gram negative bacterium which can infect humans and animals. It's commensal as a normal flora of the nasopharynx and tonsils in cattle, sheep and goats, pneumonic pasteurellosis is one of the most economically important infectious disease in goats worldwide prevalence. This study aimed to investigate the incidence of M. haemolytica by bacteriological and molecular characterization in goats. One hundred nasopharyngeal swabs were collected from apparently healthy field goats, seven lung tissue specimens and five nasal mucus swabs from slaughtered goats in Baghdad. All samples were cultured on Blood and MacConky agars. Biochemical tests and EPI20E kit were used for identification of the suspected colonies. 5 (4.46%) isolates of M. haemolytica were identified phenotypicaly and confirmed diagnosis by polymerase chain reaction (PCR) technique using two primers 16s rRNA and 12s rRNA genes .The results of this study concluded that identification of M. haemolytica by PCR was in accordance with those of phenotypic tests and it providing the basis for effective preventative strategies through epidemiological studies performance.

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The tonsillar carriage of Pasteurella haemolytica in lambs

Cited by 33 publications

References 8 publications

Effects of Lamb Sucking on the Bacterial Flora of Teat Duct and Mammary Gland of Ewes

Effects of Lamb Sucking on the Bacterial Flora of Teat Duct and Mammary Gland of Ewes

MALT structure and function in farm animals

Molecular and Phenotypical Characterization of <i>Mannheimia haemolytica</i> Isolated from Goats in Baghdad Province

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The tonsillar carriage of Pasteurella haemolytica in lambs

Cited by 33 publications

References 8 publications

Effects of Lamb Sucking on the Bacterial Flora of Teat Duct and Mammary Gland of Ewes

Effects of Lamb Sucking on the Bacterial Flora of Teat Duct and Mammary Gland of Ewes

MALT structure and function in farm animals

Molecular and Phenotypical Characterization of &lt;i&gt;Mannheimia haemolytica&lt;/i&gt; Isolated from Goats in Baghdad Province

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Molecular and Phenotypical Characterization of <i>Mannheimia haemolytica</i> Isolated from Goats in Baghdad Province