<i>Syphacia </i>(<i>Syphacia</i>) <i>maxomyos</i> sp. n. (Nematoda: Oxyuridae) from <i>Maxomys</i> spp. (Rodentia: Muridae) from Sulawesi and Sumatra, Indonesia

Abstract

The present report describes Syphacia (Syphacia) maxomyos sp. n. (Nematoda: Oxyuridae) from two species of spiny rats, Maxomys musschenbroekii from Sulawesi and M. whiteheadi from Sumatra. It is characterized by a cephalic plate extending laterally with dorsoventral constriction and stumpy eggs with an operculum rim reaching pole. It is readily distinguishable by the former feature from all of hitherto known representatives of this genus in Indonesia, but it resembles parasites in Murini and Hydromyni rodents in continental Asia and Sahul. This is the first Syphacia species distributed in both the Sunda Shelf and Sulawesi with the exception of Syphacia muris, a cosmopolitan pinworm found in rodents of the of genus Rattus. It is surmised that S. maxomyos is specific to Maxomys and that it was introduced to Sulawesi by dispersal of some Maxomys from the Sunda Shelf.

Morphological and molecular studies on a nematode parasite, Syphacia obvelata, infecting laboratory mice (Mus musculus) in Saudi Arabia

“…The sequence obtained from the spacer regions of OQ874775 showed three mutations at the ITS2, whereas ITS1 as well 5.8S were identical to sequences from S. obvelata deposited in NCBI GenBank. It has been well documented that Syphacia species demonstrate co-evolution with their hosts and host specificity (Hugot, 1988(Hugot, , 1999Adamson, 1989;Dewi et al, 2014;Garcia et al, 2018). So far, all isolates of S. obvelata for which sequences are available in NCBI GenBank were from Mus musculus.…”

“…Pinworm infection is routinely reported in various rodent housing facilities even under strict bio-exclusion http://dx.doi.org/10.1590/1678-4162-13135 procedures Meade and Watson, 2014). Parasitic infection occurs through the fecal-oral route (Effler et al, 2008). Although pinworms are generally nonpathogenic (Abdel-Gaber et al, 2018), and the resulting clinical signs are rare unless there are heavy loads of infection in immunocompetent animals (Chawla et al, 2015), pinworms may have deleterious effects on several research implications (Agersborg et al, 2001).…”

“…Among 24 species of this genus, Syphacia obvelata and Syphacia muris commonly infect the caecum and colon of rodents (Mahmoud et al 2009;Plachý et al, 2015;Gerwin et al, 2017). The primary discriminating tool among these nematodes was based on morphological examination of male worms which include the presence/absence of gubernaculum, shape and size of spicules, number and form of mamelons and cloacal papillae (Landaeta-Aqueveque et al, 2007;Dewi et al, 2014;Khalil et al, 2014;Abdel-Gaber, 2016;Behnke et al, 2022). Regarding the insufficient criteria to differentiate between pinworms, molecular advanced tools have been recently used to discriminate closely related oxyurid species (Cao et al, 2020;Omer et al, 2020).…”

Distribution extension of Syphacia (Seuratoxyuris) peromysci Harkema, 1936 (Nematoda, Syphaciinae) parasitizing the Rock Mouse, Peromyscus difficilis (J. A. Allen, 1891) (Rodentia, Neotominae) in central Mexico

“…The nematode genus Syphacia Seurat, 1916 includes more than 67 parasite species of rodents (Dewi and Hasegawa 2014;Dewi et al 2014aDewi et al , 2014bDewi et al , 2015Robles et al 2014); this genus was divided into three subgenera by Hugot (1988), two distributed in North and South America, Asia, Australia and Europe (Seuratoxyuris Hugot, 1988 andSyphacia Seurat, 1916) and one (Cricetoxyuris Hugot, 1988) in Africa.…”