An Intracellular Symbiont of the Hog Louse

Florence, Laura

doi:10.4269/ajtmh.1924.s1-4.397

Cited by 7 publications

(6 citation statements)

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“…Molecular phylogenetic analysis based on bacterial 16S rRNA gene sequences showed that the bacterium is closely related to and forming a distinct clade with the endosymbionts of H. suis, H. apri and H. eurysternus whose 16S rRNA gene sequences have been reported previously (Hypša and Křížek, 2007) (Figure 2). Detailed histological observations by FISH (Figure 3) revealed that in vivo localization and infection dynamics of the bacterium are concordant with the detailed early histological descriptions on the endosymbiont localization in H. eurysternus (Ries, 1931), and, though less comprehensive, in H. suis (Florence, 1924;Żelazowska and Biliński, 1999). Therefore, we conclude that this bacterium is the primary endosymbiont of H. apri, and suggest that this bacterial clade may represent the primary endosymbiont clade of Haematopinus ungulate lice.…”

Section: Discussionsupporting

confidence: 80%

“…Hence, it seems likely that proliferation of the microbes in the dead insect bodies resulted in the exceptional microbial compositions in these samples. Taken together, these results strongly suggested that a single bacterial species constitutes the major microbial associate of H. apri and H. suis, which is likely the primary endosymbiont as described in previous histological and phylogenetic studies on H. suis (Florence, 1924;Żelazowska and Biliński, 1999;Hypša and Křížek, 2007).…”

Section: Microbiome Of Haematopinus Apri and Haematopinus Suissupporting

confidence: 83%

“…In the recognized diversity of the symbiotic organs and the endosymbiotic bacteria among sucking lice ( Ries, 1931 ; Buchner, 1965 ; Rio et al, 2016 ; Husnik, 2018 ), previous studies on the endosymbiotic system in Haematopinus ungulate lice were restricted to early histological descriptions on H. suis and H. eurysternus ( Florence, 1924 ; Ries, 1931 ; Żelazowska and Biliński, 1999 ) and a brief molecular phylogenetic characterization for H. suis , H. eurysternus and H. apri ( Hypša and Křížek, 2007 ). As for the boar louse H. apri , the only available information on its endosymbiont has been a single 16S rRNA gene sequence ( Hypša and Křížek, 2007 ).…”

Section: Discussionmentioning

confidence: 99%

“…Historically, the endosymbiotic bacteria of Haematopinus spp. have been described as follows: the initial microscopic detection in H. suis ( Sikora, 1919 ; Buchner, 1920 ; Florence, 1924 ); detailed histological inspection of in vivo localization and developmental dynamics in H. eurysternus ( Ries, 1931 ); transmission electron microscopic observation in H. suis ( Żelazowska and Biliński, 1999 ); and molecular phylogenetic analysis based on 16S rRNA gene sequences from H. suis , H. eurysternus and Haematopinus apri ( Hypša and Křížek, 2007 ). These previous studies, mostly conducted on H. suis or H. eurysternus , have shown that the endosymbionts of Haematopinus spp.…”

Section: Introductionmentioning

confidence: 99%

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Endosymbiotic bacteria of the boar louse Haematopinus apri (Insecta: Phthiraptera: Anoplura)

et al. 2022

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Insects exclusively feeding on vertebrate blood are usually dependent on symbiotic bacteria for provisioning of B vitamins. Among them, sucking lice are prominent in that their symbiotic bacteria as well as their symbiotic organs exhibit striking diversity. Here we investigated the bacterial diversity associated with the boar louse Haematopinus apri in comparison with the hog louse Haematopinus suis. Amplicon sequencing analysis identified the primary endosymbiont predominantly detected from all populations of H. apri with some minor secondary bacterial associates. Sequencing and phylogenetic analysis of bacterial 16S rRNA gene confirmed that the endosymbionts of the boar louse H. apri, the hog louse H. suis and the cattle louse Haematopinus eurysternus form a distinct clade in the Gammaproteobacteria. The endosymbiont clade of Haematopinus spp. was phylogenetically distinct from the primary endosymbionts of other louse lineages. Fluorescence in situ hybridization visualized the endosymbiont localization within midgut epithelium, ovarial ampulla and posterior oocyte of H. apri, which were substantially the same as the endosymbiont localization previously described in H. suis and H. eurysternus. Mitochondrial haplotype analysis revealed that, although the domestic pig was derived from the wild boar over the past 8,000 years of human history, the populations of H. apri constituted a distinct sister clade to the populations of H. suis. Based on these results, we discussed possible evolutionary trajectories of the boar louse, the hog louse and their endosymbionts in the context of swine domestication. We proposed ‘Candidatus Haematopinicola symbiotica’ for the distinct clade of the endosymbionts of Haematopinus spp.

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Section: Discussionsupporting

confidence: 80%

Section: Microbiome Of Haematopinus Apri and Haematopinus Suissupporting

confidence: 83%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Endosymbiotic bacteria of the boar louse Haematopinus apri (Insecta: Phthiraptera: Anoplura)

et al. 2022

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“…Mansour (1934a, b) has furnished considerable data concerning the intracellular microorganisms in coleopterous insects; and Gier (1936) has studied the structure and behavior of the intracellular "bacteroids" of roaches. (See also Blochmann, 1892; Florence, 1924. ) Interesting light-producing organs and groups of cells, comparable to the mycetomes and bacteriocytes, have been found in some insects as well as in certain other animals.…”

Section: Intracellular Flora Of Insectsmentioning

confidence: 99%