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Faisal M, Diamanka A, Loch TP, LaFrentz BR, Winters AD, García JC, Toguebaye BS. Isolation and characterization of Flavobacterium columnare strains infecting fishes inhabiting the Laurentian Great Lakes basin. J Fish Dis 2017; 40:637-648. [PMID: 27592613 DOI: 10.1111/jfd.12548] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 07/05/2016] [Accepted: 07/06/2016] [Indexed: 06/06/2023]
Abstract
Flavobacterium columnare, the aetiological agent of columnaris disease, causes significant losses in fish worldwide. In this study, the prevalence of F. columnare infection was assessed in representative Great Lakes fish species. Over 2000 wild, feral and hatchery-propagated salmonids, percids, centrarchids, esocids and cyprinids were examined for systemic F. columnare infections. Logistic regression analyses showed that the prevalence of F. columnare infection varied temporally and by the sex of the fish, whereby females had significantly higher prevalence of infection. A total of 305 isolates of F. columnare were recovered. Amplification of the near complete 16S rRNA gene from 34 representative isolates and subsequent restriction fragment length polymorphism analyses demonstrated that all belonged to F. columnare genomovar I. Phylogenetic analysis of near complete 16S rRNA gene sequences also placed the isolates in genomovar I, but revealed some intragenomovar heterogeneity. Together, these results suggest that F. columnare genomovar I is widespread in the Great Lakes Basin, where its presence may lead to mortality.
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Affiliation(s)
- M Faisal
- Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, MI, USA
- Department of Fisheries and Wildlife, College of Agriculture and Natural Resources, Michigan State University, East Lansing, MI, USA
| | - A Diamanka
- Laboratoire de Parasitologie Département Biologie Animale Faculté des Sciences et Techniques, Université Cheikh Anta DIOP, Dakar, Senegal
| | - T P Loch
- Department of Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, MI, USA
| | - B R LaFrentz
- Aquatic Animal Health Research Unit, United States Department of Agriculture-Agricultural Research Service (USDA-ARS), Auburn, AL, USA
| | - A D Winters
- Department of Immunology and Microbiology, School of Medicine, Wayne State University, Detroit, MI, USA
| | - J C García
- Aquatic Animal Health Research Unit, United States Department of Agriculture-Agricultural Research Service (USDA-ARS), Auburn, AL, USA
| | - B S Toguebaye
- Laboratoire de Parasitologie Département Biologie Animale Faculté des Sciences et Techniques, Université Cheikh Anta DIOP, Dakar, Senegal
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Toguebaye BS, Marchand B, Faye N. Preliminary observations on a microsporidian parasite ofChloroscombrus chrysurusLinnaeus, 1776 (Teleost fish). ACTA ACUST UNITED AC 2016. [DOI: 10.1051/parasite/1989642157] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Diamanka A, Boudaya L, Toguebaye BS, Pariselle A. Lamellodiscus euzeti n. sp. (Monogenea:Diplectanidae), a parasite from Dentex canariensis and D. gibbosus (Teleostei:Sparidae) in the Atlantic Ocean and Mediterranean Sea. Parasite 2011; 18:145-50. [PMID: 21678790 PMCID: PMC3671416 DOI: 10.1051/parasite/2011182145] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Lamellodiscus euzeti n. sp. (Monogenea: Diplectanidae) is described from the gills of two sparid fishes, Dentex canariensis (Steindachner) off Senegal and Ivory Coast and D. gibbosus (Rafinesque) off Senegal and Tunisia. The new species belongs to the “ignoratus” group, characterized by a lamellodisc with complete lamellae, a “lyre” shaped male copulatory organ type, and the “ignoratus” sensu stricto subgroup, characterized by a haptor with simple lateral dorsal bars. Lamellodiscus euzeti n. sp can be distinguished from all the congeneric species of the “ignoratus” subgroup by the presence of a prominent protuberance at the base of the curved part of the simple piece of the male copulatory organ (MCO), a large bulb at the base of the bifurcated piece of the MCO and the presence of 5-6 spines in the distal portion of the axial branch of the bifurcated piece of the MCO. Specificity and biogeography of Lamellodiscus species from sparid fishes are discussed.
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Affiliation(s)
- A Diamanka
- Laboratory of Parasitology, Department of Animal Biology, Faculty of Sciences and Technologies, University Cheikh Anta Diop, Dakar, Senegal
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Abstract
The seroprevalence against heartwater for maure zebus coming from Mali and Mauritania is analysed by indirect ELISA using the major antigenic protein number 1-B (MAP1-B). Sero-epidemiological results realized on maure zebu cattle give a good adequation between the abundance or absence of the vector tick in the two countries for 98% of prevalence in Mali (infected area) and 0% of prevalence in Mauritania (non infected area).
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Affiliation(s)
- M Mbengue
- Institut sénégalais de recherches agricoles, Laboratoire national de l'élevage et de recherches vétérinaires, BP 2057, Dakar Hann, Senegal.
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Kostoïngué B, Fall M, Diébakaté C, Faye N, Toguebaye BS. Light and electronic observations on Henneguya ghaffari (Myxosporea, Bivalvulida) infecting the gills and intestine of Nile perch Lates niloticus (Pisces: Teleostei) from Chad and Senegal. Dis Aquat Organ 2003; 54:79-83. [PMID: 12718475 DOI: 10.3354/dao054079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Henneguya ghaffari Ali, 1999, described for the first time in Egypt, has been found on gills and intestine of Nile perch Lates niloticus L. from Chad and Senegal (Africa). It formed plasmodia which induced lesions of infected tissues. In fresh state, the spore body was ovoid and its size was 11.07 +/- 0.7 (range 11 to 13) x 7.7 +/- 0.4 (range 7 to 8) microm. The length of the caudal appendages was 44.2 +/- 1.7 (42 to 48) microm. The polar capsules were pyriform, of equal size, with the polar filament showing 4 coils, and measuring 3.17 +/- 0.1 (range 3 to 4) x 2.2 +/- 0.1 (range 1 to 2) microm. The total length of the spore was 55.73 +/- 1.7 (range 53 to 61) microm. At ultrastructural level, our results confirm that in Henneguya species, the sporoplasm is binucleate and the pansporaoblast is disporous.
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Affiliation(s)
- B Kostoïngué
- Department of Biology, Faculty of Sciences, University of N'Djaména, PO Box 1027, Chad
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Diebakate C, Fall M, Faye N, Toguebaye BS. [Unicapsula marquesi n. sp. (Mysxosporea, Multivalvulida) a gill parasite of Polydactylus quadrifilis (Cuvier, 1829) (Pisces, Polynemidae) from the senegalese coast (West Africa)]. Parasite 1999; 6:231-5. [PMID: 10511971 DOI: 10.1051/parasite/1999063231] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Unicapsula marquesi n. sp. (Myxosporea) is described from gill filaments of Polydactylus quadrifilis (Pisces, Polynemidae) obtained from coats of Senegal. The cysts were elongated and their length was 1 to 3 mm. The spores were pyramidal and composed of three valves. Only one of theses valves contained a developed polar capsule measuring 3.01 +/- 0.09 microns in diameter. Length of spore was 6.13 +/- 0.21 microns and the width was 7.18 +/- 0.17. No filament like appendage at the extremity of shell valves. Data on ultrastructure of spores are presented.
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Affiliation(s)
- C Diebakate
- Département de Biologie animale, Faculté des Sciences et Techniques, Université C.A. Diop de Dakar, Sénégal
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Ndiaye M, Ndir O, Diarra K, Gaye O, Toguebaye BS, Diallo S. [Scanning electron microscope sudy of the morphology of fungi isolated from patients at the Aristide La Dantec Hospital in Dakar, Senegal]. Dakar Med 1998; 41:1-6. [PMID: 9827085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
In order to improve the identification of fungi usually isolated among some patients at Dantec Hospital, a study by scanning electron microscopy has been carried out. It deals with four species of yeasts (Candida albicans, Candida parapsilosis, Rhodotorula rubra Sacharomyces cerevisiae) six species of dermatophytes (Trichophyton rubrum, Trichophyton soudanense, Trichophyton interdigitale, Microsporum canis, Trichophyton violaceum, Microsporum audouinii); two species of mildew, (Aspergullus flavus, Aspergillus niger) and one species of dimorphic fungi (Histoplasma duboisii). The yeasts get a smooth surface with, often, a mark of but on it. Microsporum canis presents some echinulate macroconidia. Trichophyton violaceum is characterized by the appearance of echinulate chlamydoconidium with a twofold bulge and Microsporum audouinii by a echinulate chlamydoconidium with a bulge only. Trichophyton rubrum presents macroconidia with smooth surface and in "sausage" form, as for Trichophyton soudanense it presents some arthroconidia that are cells which get more or less rectangular form and with smooth surface. Aspergillus flavus is characterized by the presence of a conidiophore with a verrucosis surface and an aspergillary head of about 36 microns having some spores with almost smooth inner surface. On the other hand, Aspergillus niger gets a conidiophore with smooth surface. As for Histoplasma duboisii, the surface of the chlamydoconidium presents some verrucosis that are real conidia in formation. The scanning electron microscopy enables use to discover the existence of characters that are likely to be used for the identification of fungi.
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Affiliation(s)
- M Ndiaye
- Laboratoire de Parasitologie-Mycologie, Hôpital Aristide Le Dantec, Dakar
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Faye N, Toguebaye BS, Bouix G. Nosemoides syacii n. sp., a microsporidian parasite of the West African turbot Syacium micrurum Ranzani, 1840. Syst Parasitol 1994. [DOI: 10.1007/bf00009837] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Faye N, Toguebaye BS, Bouix G. Microfilum lutjani N. G. N. Sp. (Protozoa Microsporida), a gill parasite of the golden African snapper Lutjanus fulgens (Valenciennes, 1830) (Teleost Lutjanidae): developmental cycle and ultrastructure. J Protozool 1991; 38:30-40. [PMID: 1997675 DOI: 10.1111/j.1550-7408.1991.tb04793.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Microfilum lutjani n. g., n. sp. (Microsporida) was found on the gill filaments of Lutjanus fulgens (Teleost) inhabiting the coasts of Senegal. This microsporidium forms xenomas distinguished by the microvilli covering the plasma membrane. At all stages of development individuals have isolated nuclei and are in direct contact with the host cytoplasm. Merogony is binary and sporogony is tetrasporoblastic. The spore (4.75 x 2.60 microns) is characterized by a manubrium inserted on a laterally offset anchoring disc and extending into a very short, noncoiled polar filament (no longer than 500 nm) in the form of a hook. This type of polar filament has not been described previously in the Microsporida.
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Affiliation(s)
- N Faye
- Laboratoire de Parasitologie, Faculté des Sciences, Université C.A. Diop, Dakar, Sénégal
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Toguebaye BS, Marchand B. Etude histopathologique et cytopathologique d'une microsporidiose naturelle chez la coccinelle des cucurbitacees d'afrique,Henosepilachna elaterii [Col.: Coccinellidae]. ACTA ACUST UNITED AC 1984. [DOI: 10.1007/bf02372164] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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