Pathological Study of Blood Parasites in Rice Field Frogs,<i>Hoplobatrachus rugulosus</i>(Wiegmann, 1834)

Sailasuta, Achariya; Satetasit, Jetjun; Chutmongkonkul, M.

doi:10.4061/2011/850568

Cited by 12 publications

(10 citation statements)

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“…in Lithobates clamitans (Ranidae) is benign or undetectable to the immune system. In contrast, Sailasuta et al (2011) show an infection by two morphotypes of Hepatozoon sp. caused pathological lesions with subacute to chronic inflammation in the liver of Hoplobatrachus rugulosus (Dicroglossidae).…”

Section: Discussionmentioning

confidence: 92%

Hemogregarine and Rickettsial infection in ticks of toads from northeastern Colombia

Cotes-Perdomo

Santodomingo

Castro

2018

International Journal for Parasitology: Parasites and Wildlife

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The toads Rhinella spp. are in constant contact with humans and domestic animals and are commonly parasitized by ticks, which are also potential vectors of pathogenic microorganisms, such as apicomplexans and rickettsia. However, little is known about microorganisms associated with toad ticks. In this work, we molecularly evaluated the presence of Rickettsia spp. and hemogregarines in ticks of Rhinella horribilis and R. humboldti in the Colombian Caribbean, finding two different species of Rickettsia: the colombianensi strain and one close to R. bellii. In the case of hemogregarines, since only 18S gene sequences are available, it is difficult to define species and place them correctly in a phylogeny, but most of our samples show a 99% identity with Hemolivia stellata, while others identical to each other seem to form another clade within this genre. All collected ticks were identified as Amblyomma dissimile, representing the first time that H. stellata was recorded in this tick. The prevalence of both microorganisms was very high, which makes it necessary to generate robust phylogenies to clarify their taxonomic diversity and to correctly define their ecological role and pathogenicity, which should be taken into account in amphibian conservation plans and veterinary medicine.

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Section: Discussionmentioning

confidence: 92%

Hemogregarine and Rickettsial infection in ticks of toads from northeastern Colombia

Cotes-Perdomo

Santodomingo

Castro

2018

International Journal for Parasitology: Parasites and Wildlife

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“…Trypomastigotes of both species, however, have large size and this new species thus becomes a new member of the giant trypanosomes that includes species such as Trypanosoma mega , T. ranarum and T. rotatorium ( Martin et al., 2002 ). Despite the widespread distribution of T. chattoni including Asia (China, Werner, 1993 ; Kyushu and Ryukyu Islands, Miyata, 1978 ; Thailand, Sailasuta et al., 2011 ), North America (United Sates, Diamond, 1965 ; Canada, Jones and Woo, 1986 ) and South America (Brazil, Lemos et al., 2008 ), this species is monomorphic with little geographic variation. Both T. chattoni and T. tungarae n. sp.…”

Section: Resultsmentioning

confidence: 99%

Sexual differences in prevalence of a new species of trypanosome infecting túngara frogs

Bernal

Pinto

2016

International Journal for Parasitology: Parasites and Wildlife

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Trypanosomes are a diverse group of protozoan parasites of vertebrates transmitted by a variety of hematophagous invertebrate vectors. Anuran trypanosomes and their vectors have received relatively little attention even though these parasites have been reported from frog and toad species worldwide. Blood samples collected from túngara frogs (Engystomops pustulosus), a Neotropical anuran species heavily preyed upon by eavesdropping frog-biting midges (Corethrella spp.), were examined for trypanosomes. Our results revealed sexual differences in trypanosome prevalence with female frogs being rarely infected (<1%). This finding suggests this protozoan parasite may be transmitted by frog-biting midges that find their host using the mating calls produced by male frogs. Following previous anuran trypanosome studies, we examined 18S ribosomal RNA gene to characterize and establish the phylogenetic relationship of the trypanosome species found in túngara frogs. A new species of giant trypanosome, Trypanosoma tungarae n. sp., is described in this study. Overall the morphometric data revealed that the trypomastigotes of T. tungarae n. sp. are similar to other giant trypanosomes such as Trypanosoma rotatorium and Trypanosoma ranarum. Despite its slender and long cell shape, however, 18S rRNA gene sequences revealed that T. tungarae n. sp. is sister to the rounded-bodied giant trypanosome, Trypanosoma chattoni. Therefore, morphological convergence explains similar morphology among members of two non-closely related groups of trypanosomes infecting frogs. The results from this study underscore the value of coupling morphological identification with molecular characterization of anuran trypanosomes.

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“…UKM Danau golf club anurans had the most haemoparasite groups compared to Jeriau river and Fraser's hill golf course. The haemoparasites present in Sailasuta et al (2011) in their study conducted in Thailand. A previous study by Muhammad et al (2013) conducted in Malaysia found only two groups of parasites: Trypanosoma and Lankesterella, while another study also conducted in Malaysia but in other locations reported presence of five groups of haemoparasites (Rahman and Shakinah, 2015).…”

Section: Resultsmentioning

confidence: 97%

Abundance of anuran parasites and pesticide pollution from lowland and highland golf courses

Agustar¹,

Jansar²,

Ali³

et al. 2021

JEB

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Aim: This study aimed to determine the pesticide pollution and prevalence of protozoa in anurans from lowland and highland golf courses in Malaysia and to observe the relationship between environmental factors (water quality index and pollutants) and the presence of protozoa in anurans. Methodology: Water quality index and pesticide levels (metsulfuron methyl) were measured at three locations, i.e. Jeriau river, Fraser's hill golf course in Pahang, and UKM Danau golf club in Selangor. Microscopy techniques were used to identify and examine the prevalence of protozoa and haemoparasites in anuran organs (stomach, kidney, liver, intestine, rectum, and blood). Results: A total of 140 anurans were collected from the study areas. Jeriau river had the highest water quality compared to Fraser's hill golf course and UKM Danau golf club. Metsulfuron methyl concentrations at all three locations were under permissible level (0.001–0.01 mg l-1). Approximately, 30% of the anurans were infected with ≥ 1 protozoa, of which 22.14% were from phylum Opalinata and 10.71% were from phylum Ciliophora (Nyctotherus cordiformis). Approximately 44.44% of the anurans were infected with ≥ 1 groups of haemoparasites, which included Trypanosoma, Haemogregarina, Lankesterella, Aegyptianella and Microfilaria. Interpretation: No significant relationship was found between the environmental parameters and the abundance of protozoa and haemoparasites in anurans from three locations, indicating that the prevalence of protozoa and haemoparasites in anurans is not influenced by environmental factors.

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Pathological Study of Blood Parasites in Rice Field Frogs,Hoplobatrachus rugulosus(Wiegmann, 1834)

Cited by 12 publications

References 11 publications

Hemogregarine and Rickettsial infection in ticks of toads from northeastern Colombia

Hemogregarine and Rickettsial infection in ticks of toads from northeastern Colombia

Sexual differences in prevalence of a new species of trypanosome infecting túngara frogs

Abundance of anuran parasites and pesticide pollution from lowland and highland golf courses

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