Eimeria spp. infection in lambs from southern Brazil

ABSTRACT: Eimeria infections are common in the sheep industry worldwide. Lambs are more susceptible to coccidiosis, especially in stressful conditions, being infected by different species of the parasite. Eimeria crandallis and Eimeria ovinoidalis are considered the most pathogenic, causing reduced growth, dehydration, anorexia, and death. In this study, the frequency of Eimeria species was evaluated in lambs from the southern region of the Rio Grande do Sul state, Brazil. Fecal samples from 248 lambs, from 19 farms, were tested for the presence of oocysts. The positive samples were re-examined and the sporulated oocysts analyzed morphometrically to identify the presence of Eimeria species. In 100% of the evaluated farms, there were animals positive for the protozoan. The frequency of Eimeria species was: E. ovinoidalis (94.74%), E. crandallis (89.47%), E. granulosa (78.95%), E. parva (68.42%), E. ahsata (63.13%), E. punctata (42.11%), E. bakuensis (36.84%), E. faurei (10.53%), and E. pallida (5.26%). Mixed infection was found in 94.74% of the samples. This research describes, for the first time, the occurrence of E. crandallis and E. ovinoidalis infecting lambs in the study area. The wide distribution of this protozoan and the high frequency of pathogenic species show the importance and potential damage of sheep coccidiosis in herds from Rio Grande do Sul.

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Ovine Eimeria infections in southern Brazil – prevalence and risk factors

Semina Ciências Agrárias ◽

10.5433/1679-0359.2022v43n1p229 ◽

2022 ◽

Vol 43 (1) ◽

pp. 229-240

Author(s):

Natália Soares Martins ◽

◽

Sara Patron da Motta ◽

Carolina Caetano dos Santos ◽

Andrios da Silva Moreira ◽

...

Keyword(s):

Risk Factors ◽

Eimeria Species ◽

Rio Grande ◽

Farming System ◽

Wide Distribution ◽

Farm Size ◽

Rio Grande Do Sul ◽

Cross Sectional ◽

Animal Density ◽

Eimeria Spp

Eimeria infections are common in sheep industry worldwide, however information about their epidemiology is scarce in southern state of Rio Grande do Sul, Brazil. Therefore, a cross-sectional study was carried out to determine the prevalence, species characterization, and associated risk factors between Eimeria species and sheep flocks. Fecal samples from 428 sheep from 21 farms were tested for the presence of oocysts. The overall prevalence of Eimeria spp. was 68.69% and was significantly affected by age of the sheep, with highest prevalence in animals under 18 months of age. Eight Eimeria species were identified. Eimeria ovinoidalis (85.71%) was the most common, followed by Eimeria crandallis (80.95%), Eimeria granulosa (78.95%), Eimeria ahsata (61.90%), Eimeria faurei (42.86%), Eimeria bakuensis (38.10%), Eimeria punctata (14.29%), and Eimeria pallida (9.52%). All herds were positive, with concomitant infections. Among management and husbandry practices; farm size, animal density, farming system, breeding objectives, and pasture system influenced the prevalence of Eimeria species. The infection was more prevalent on small farms with high animal density, in sheep raised for meat, semi-intensive system, and rotational grazing (p < 0.05). The wide distribution of this protozoan and the high frequency of pathogenic species show the importance and potential damage of coccidiosis in sheep flocks in Rio Grande do Sul.

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Semiaquatic bugs (Hemiptera, Heteroptera, Gerromorpha) from Rio Grande do Sul, southern Brazil

Check List ◽

10.15560/17.5.1323 ◽

2021 ◽

Vol 17 (5) ◽

pp. 1323-1343

Author(s):

Juliana Mourão dos Santos Rodrigues ◽

Oséias Martins Magalhães ◽

Evaldo Alves Joaquim Júnior ◽

José Ricardo Inacio Ribeiro ◽

Felipe Ferraz Figueiredo Moreira

Keyword(s):

Atlantic Forest ◽

New Records ◽

Rio Grande ◽

The State ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Pampa Biome ◽

First Time

Rio Grande do Sul (RS) is the southernmost state in Brazil and includes areas within the Pampa and Atlantic Forest biomes. The semiaquatic bugs (Hemiptera, Heteroptera, Gerromorpha) from RS are poorly known, with only 14 previously recorded species. We carried out two expeditions in this state, in 2002 and 2019, across 19 municipalities. Here, we provide new records for 19 species, of which 13 are recorded for the first time from the state, five have their distributions expanded, and one is recorded again from a same locality previously reported in the literature. Furthermore, 13 species were collected for the first time in the Pampa biome and one in the Atlantic Forest.

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First records of the invasive spider Badumna longinqua (L. Koch) (Desidae) in southern Brazil with notes on the habitats and the species’ dispersion

Check List ◽

10.15560/11.1.1533 ◽

2015 ◽

Vol 11 (1) ◽

pp. 1533 ◽

Cited By ~ 3

Author(s):

Miguel Simó ◽

Álvaro Laborda ◽

Martín Núñez ◽

Antonio D. Brescovit

Keyword(s):

Invasive Species ◽

Rio Grande ◽

Public Parks ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Urban Habitats ◽

The Family ◽

Two Cities ◽

National Highway ◽

First Time

The invasive species Badumna longinqua and the family Desidae are recorded for the first time for Brazil. The spiders were collected in urban habitats of two cities from the state of Rio Grande do Sul in southern Brazil. Specimens and their webs were found in public parks, window frames and in a cemetery. The absence of this species along a national highway route and its dispersion in Brazil are discussed.

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New record and occurrence map of Tityus serrulatus Lutz & Mello, 1922 (Scorpiones, Buthidae) in the state of Rio Grande do Sul, southern Brazil

Check List ◽

10.15560/11.1.1556 ◽

2015 ◽

Vol 11 (1) ◽

pp. 1556 ◽

Cited By ~ 1

Author(s):

Conrado Mario da Rosa ◽

Arthur Diesel Abegg ◽

Leandro Malta Borges ◽

Gabriela S. S Bitencourt ◽

Rocco Alfredo Di Mare

Keyword(s):

Urban Area ◽

Central Region ◽

New Record ◽

Rio Grande ◽

The State ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Tityus Serrulatus ◽

First Time ◽

Santa Maria

The Brazilian scorpion Tityus serrulatus is recorded for the first time in the central region of Rio Grande do Sul, thus filling a gap of 567 km in its distribution. A specimen of the scorpion was collected in the urban area of the municipality of Santa Maria (29°43′51.31″ S, 053°48′5.74″ W) on 31 June 2014. A map was generated with the points of occurrence of the species in the state.

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First record of Cithaeron reimoseri (Araneae: Cithaeronidae) from the New World and first record of the family from southern Brazil

Check List ◽

10.15560/9.6.1594 ◽

2013 ◽

Vol 9 (6) ◽

pp. 1594 ◽

Cited By ~ 1

Author(s):

Ricardo Ott ◽

Antonio Domingos Brescovit

Keyword(s):

New World ◽

Rio Grande ◽

First Record ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Porto Alegre ◽

Worldwide Distribution ◽

The Family ◽

First Time ◽

Median Eyes

The African spider Cithaeron reimoseri Platnick, 1991 is registered for the first time in the New World, based in two females collected at Porto Alegre, Rio Grande do Sul, Brazil. Until now C. reimoseri was known only by the holotype from Eritrea. The species C. praedonius O. P.-Cambridge, 1872 was, until now, the only known species of the family with worldwide distribution and is considered prone to introduction in anthropic environments. Cithaeronidae are considered lower gnaphosoids being identifiable by the depressed posterior median eyes and the pseudosegmented tarsi.

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Temnocephala lutzi Monticelli (Platyhelminthes, Temnocephalida) ectosymbiont on two species of Trichodactylus Latreille (Crustacea, Decapoda, Trichodactylidae) from southern Brazil

Revista Brasileira de Zoologia ◽

10.1590/s0101-81752005000400038 ◽

2005 ◽

Vol 22 (4) ◽

pp. 1085-1094 ◽

Cited By ~ 10

Author(s):

José F. R. Amato ◽

Suzana B. Amato ◽

Samantha A. Seixas

Keyword(s):

Silver Nitrate ◽

Rio Grande ◽

The State ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Lower Side ◽

Freshwater Crabs ◽

Silver Nitrate Staining ◽

Typical Shape ◽

First Time

Temnocephala lutzi Monticelli, 1913, ectosymbiont on brachyuran freshwater crabs of the genus Trichodactylus Latreille, 1828 is recorded for the first time in the State of Rio Grande do Sul, southern Brazil. Two hundred and seventy-nine crabs of two species were examined: 211 Trichodactylus panoplus (von Martens, 1869) and 68 Trichodactylus fluviatilis Latreille, 1828 of which 51 (24.17%) and 28 (41.17%) were positive for T. lutzi, respectively. Crabs of both species carried eggs fixed, exclusively, on the floor of the branchial chambers and/or on the lower side of the gills. Adult as well as young specimens were found inside and outside the branchial chambers. The temnocephalans were always devoid of body pigmentation, although they kept the red eye pigment undiluted in specimens fixed by formalin. The cirrus of T. lutzi showed the typical shape for the species, while the dorsolateral, post tentacular 'excretory' syncytial plates, demonstrated by two special techniques (silver nitrate staining and SEM), appeared with an elliptical shape and a central nephridiopore.

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Helminths of Molothrus bonariensis (Gmelin, 1789) (Passeriformes: Icteridae) from southernmost Brazil

Revista Brasileira de Parasitologia Veterinária ◽

10.1590/s1984-29612016042 ◽

2016 ◽

Vol 25 (3) ◽

pp. 279-285 ◽

Cited By ~ 3

Author(s):

Fabiana Fedatto Bernardon ◽

Tatiele de Aguiar Lopes Soares ◽

Thainá Dutra Vieira ◽

Gertrud Müller

Keyword(s):

Rio Grande ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Molothrus Bonariensis ◽

Brazilian State ◽

First Time

Abstract Information about helminths of Molothrus bonariensis (Gmelin, 1789) (Passeriformes: Icteridae) are scarce; in this sense the objective of this paper was to contribute to its knowledge. Five hosts of southern Brazil were examined and the helminths Prosthogonimus ovatus, Tanaisia valida (Digenea), Diplotriaena bargusinica and Synhimantus (Dispharynx) nasuta (Nematoda) were identified. The species T. valida, P. ovatus and S. (D.) nasuta are for the first time registered for the bird in Brazil. Prosthogonimus ovatus, T. valida, D. bargusinica e S. (D.) nasuta are first recorded in M. bonariensis in the southern Brazilian state Rio Grande do Sul.

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Phthiraptera and Gamasida Parasites of Columbina picui (Temminck) (Columbiformes: Columbidae) in the State of Rio Grande do Sul, Southern Brazil

Brazilian Journal of Biology ◽

10.1590/s1519-69842012000300022 ◽

2012 ◽

Vol 72 (3) ◽

pp. 583-585 ◽

Cited By ~ 9

Author(s):

MAA. Coimbra ◽

CS. Mascarenhas ◽

G. Müller ◽

JGW. Brum

Keyword(s):

External Surface ◽

Rio Grande ◽

The State ◽

The Body ◽

The Other ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Mean Intensity ◽

First Time ◽

Ornithonyssus Bursa

Thirty-two specimens of Columbina picui (picui ground-dove) were examined, and a collection of arthropods was made by washing the external surface of the body and the nasal cavity. The species in the order Phthiraptera found and their respective prevalences, mean abundance and mean intensity were: Columbicola passerinae (84.4%; 10.3; 12.2), Hohorstiella passerinae (21.9%; 0.7; 3.1) and Physconelloides eurysema (3.1%; 0.1; 2). The gamasid mites found in the birds and their respective prevalences, mean abundance and mean intensity were: Pellonyssus marui (31.3%; 1.2; 3.9), Ornithonyssus bursa (15.6%; 0.2. ;1.2) and Mesonyssus sp. (6.3%; 0.1; 1). Columbicola passerinae, H. passerinae, P. eurysema, O. bursa, P. marui and Mesonyssus sp. were recorded for the first time infecting C. picui in Brazil. Except for O. bursa, the other species are reported for the first time in the state of Rio Grande do Sul, Brazil.

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Two sequestrate cortinarioid fungi from Rio Grande do Sul, Brazil

Hoehnea ◽

10.1590/s2236-89062008000400003 ◽

2008 ◽

Vol 35 (4) ◽

pp. 513-518 ◽

Cited By ~ 7

Author(s):

Vagner G. Cortez ◽

Iuri G. Baseia ◽

Rosa T. Guerrero ◽

Rosa Mara B. da Silveira

Keyword(s):

Rio Grande ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Sequestrate Fungi ◽

Line Drawings ◽

First Time

Descomyces albellus (Massee & Rodway) Bougher & Castellano and Setchelliogaster tenuipes (Setch.) Pouzar, two sequestrate fungi of the Cortinariaceae are reported from Rio Grande do Sul State, in southern Brazil. The distribution and taxonomy of both taxa are briefly discussed, and descriptions, line drawings, and photos are presented. Setchelliogaster tenuipes is reported for the first time in Rio Grande do Sul State, and the occurrence of D. albellus is confirmed.

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Araneid orb-weavers (Araneae, Araneidae) associated with riparian forests in southern Brazil: a new species, complementary descriptions and new records

Zootaxa ◽

10.11646/zootaxa.2759.1.3 ◽

2011 ◽

Vol 2759 (1) ◽

pp. 60 ◽

Cited By ~ 5

Author(s):

EVERTON NEI LOPES RODRIGUES ◽

MILTON DE S. MENDONÇA, JR.

Keyword(s):

New Species ◽

New Records ◽

Rio Grande ◽

Terrestrial Ecosystems ◽

Riparian Forests ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

First Time ◽

One New Species ◽

A New Species

The Araneidae is a speciose family including web-spinning spiders that are very abundant in various terrestrial ecosystems. Sixty-five araneid species from 20 genera were collected during an inventory of riparian forests in southern Brazil. Among these were one new species, described here as Mangora piratini sp. nov. Also discovered were the previously unknown males of Alpaida citrina (Keyserling, 1893), A. octolobata Levi, 1988 and Testudinaria lemniscata (Simon, 1895), which are described here for the first time. Metazygia floresta Levi, 1995, Ocrepeira malleri Levi, 1993 and Testudinaria quadripunctata Taczanowski, 1879 are recorded for the first time for Rio Grande do Sul State, Brazil.

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