[Food hygiene and safety - What is your diagnosis?] / Lebensmittelhygiene ­ Was ist Ihre Diagnose?

INTRODUCTION: A healthy, 1,5 year old female wild boar (Sus scrofa) was shoot in a hunting district in Switzerland on June 22, 2023. The meat inspection revealed noticeable skin changes on all four distal extremities which were described histologically as multifocal epidermal hyperplasia and moderate orthokeratotic hyperkeratosis. The rest of the animal body, the organs and the lymph nodes were without any obvious lesions. The diagnosis of papilloma virus-associated exophytically growing papillomas was made. The venison was approved as fit for human consumption.

INTRODUCTION: Un sanglier femelle (Sus scrofa) en bonne santé, âgé d'un an et demi, a été abattu dans le nord de la Suisse le 22 juin 2023. L'inspection de la viande a révélé des modifications cutanées notables sur les quatre extrémités distales des membres qui ont été décrites histologiquement comme une hyperplasie épidermique multifocale et une hyperkératose orthokératosique modérée. Le reste du corps de l'animal, les organes et les ganglions lymphatiques ne présentaient aucune lésion évidente. Le diagnostic de papillomes à croissance exophytique associés à des papillomavirus a été posé. La venaison a été déclarée propre à la consommation humaine.

Equus caballus papillomavirus type 2 (EcPV2)-associated benign penile lesions and squamous cell carcinomas.

BACKGROUND: Squamous cell carcinoma is the most common genital, ocular and gastric tumour in horses. Equus caballus papillomavirus type 2 (EcPV2) DNA has been detected in several studies in equine penile squamous cell carcinomas (SCCs) and precursor lesions providing evidence of a causal role of EcPV2 in equine genital SCCs. Recently, EcPV2 E6/E7 nucleic acids were also detected in equine gastric SCCs, but further studies are required to determine the role of EcPV2 infection in the pathogenesis of gastric SCC. EcPV2 nucleic acids have been rarely described in ocular SCCs and precursor lesions. OBJECTIVES: To investigate the presence of EcPV2 nucleic acids with polymerase chain reaction (PCR) and in situ hybridisation (ISH) in penile hyperplasias, papillomas and SCCs in horses and to determine whether EcPV2 nucleic acids can be detected in SCCs affecting other locations, including the stomach, ocular tissues and larynx. METHODS: Twenty-one archival formalin-fixed paraffin embedded (FFPE) tissue samples, including 12 genital lesions comprising penile hyperplasias, papillomas and SCCs, 6 ocular SCCs, 2 gastric SCCs and 1 laryngeal SCC, were screened by PCR and ISH for EcPV2 E6/E7 DNA and mRNA. Archival FFPE tissue samples (eyelid and penile mucosa and preputium) from six horses without a diagnosis or history of neoplastic or papillomavirus-associated disease were included as controls. RESULTS: EcPV2 nucleic acids were detected by PCR and ISH in all genital lesions (12/12) and gastric SCCs (2/2), in two ocular SCCs (2/6) and in one laryngeal SCC (1/1). In control horses, one eyelid sample was positive in PCR but not in ISH. The remaining control samples were negative for EcPV2 E6/E7 nucleic acids in PCR and ISH. CONCLUSIONS: These results further support the role of EcPV2 infection in the development of equine genital SCCs and suggest that EcPV2 infection may also act as a predisposing factor for other SCCs in horses, including gastric, ocular and laryngeal SCCs.

Ovine papillomaviruses: Diversity, pathogenicity, and evolution.

The family Papillomaviridae includes a plethora of viral species infecting virtually all vertebrates excluding amphibians, with astonishing impact on human and animal health. Although more than 250 species have been described in humans, the total number of papillomaviruses (PVs) discovered in animals does not reach up to this number. In animals, PV infections are mostly asymptomatic or can cause variable clinical conditions ranging from self-limiting papillomas and other cutaneous and mucosal benign lesions to cancer. Most of animal PV types have been discovered in cattle, dogs, horses, and cats with other farm host species remaining overlooked. In particular, the number of PV types so far identified in sheep is limited. This paper comprehensively reviews ovine PVs features, including viral taxonomy and evolution; genome organization; viral tropism and pathogenesis; macroscopical features and histopathological patterns, as well as available diagnostics tools. Data are critically presented and discussed in terms of impact on veterinary and public health. The development of future dedicated research is also discussed.

Identification and molecular characterization of two papillomavirus genotypes in teat papillomatosis cases in hair goats, in Türkiye.

Papillomaviruses can cause benign or malignant proliferations on the host's skin and mucous membranes. Recent genetic studies have identified many new papillomavirus types. In this study, molecular detection and typing was performed on papilloma samples from eight hair goats with teat papillomatosis. The papilloma samples were tested with degenerate (FAP59/FAP64,MY09/MY11) and type-specific primers. One sample was positive with degenerate (MY09/MY11) and two samples were positive with Caprahircus papillomavirus-1 type specific primers. The MY09/MY11 primer sequence indicated identity to the closest Ovine papillomavirus type-2 (77.9%). The ChPV-1 primer sequence was similar to the closest ChPV-1 (99.4%). Investigating papillomavirus types in different animal species is important for determining the evolution, prevalence, host range, and interspecies transmission potential of papillomaviruses, and to indicate suitable therapeutics for later development.

Detection of a Novel Alphaherpesvirus and Avihepadnavirus in a Plantar Papilloma from a Rainbow Lorikeet (Trichoglosis moluccanus).

Cutaneous plantar papillomas are a relatively common lesion of wild psittacine birds in Australia. Next-generation sequencing technology was used to investigate the potential aetiologic agent(s) for a plantar cutaneous papilloma in a wild rainbow lorikeet (Trichoglosis moluccanus). In the DNA from this lesion, two novel viral sequences were detected. The first was the partial sequence of a herpesvirus with the proposed name, psittacid alphaherpesvirus 6, from the Mardivirus genus of the family alphaherpesviruses. This represents the first mardivirus to be detected in a psittacine bird, the first mardivirus to be detected in a wild bird in Australia, and the second mardivirus to be found in a biopsy of an avian cutaneous papilloma. The second virus sequence was a complete sequence of a hepadnavirus, proposed as parrot hepatitis B genotype H (PHBV-H). PHBV-H is the first hepadnavirus to be detected in a wild psittacine bird in Australia. Whether other similar viruses are circulating in wild birds in Australia and whether either of these viruses play a role in the development of the plantar papilloma will require testing of biopsies from similar lesions and normal skin from other wild psittacine birds.

Histopathologic and molecular characterization of Erethizon dorsatum papillomavirus 1 and Erethizon dorsatum papillomavirus 2 infection in North American porcupines (Erethizon dorsatum).

Erethizon dorsatum papillomavirus 1 (EdPV1) and Erethizon dorsatum papillomavirus 2 (EdPV2) are associated with cutaneous papillomas in North American porcupines (Erethizon dorsatum). This study defined gross, histopathologic, and molecular characteristics of viral papillomas in 10 North American porcupines submitted to the New York State Animal Health Diagnostic Center. Investigation for the presence of EdPV1 and EdPV2 DNA via polymerase chain reaction (PCR) was performed in 9 of the 10 (90.0%) porcupines, and all porcupines were investigated for the detection and localization of EdPV1 and EdPV2 E6 and E7 nucleic acid via chromogenic in situ hybridization (CISH). Next-generation sequencing (NGS) was performed in 2 porcupines. Papillomas were diagnosed on the muzzle (n = 4), caudal dorsum (n = 1), upper lip (n = 1), chin (n = 1), gingiva (n = 2), and nasal planum (n = 1). Histologically, the lesions consisted of hyperplastic epidermis or epithelium with orthokeratotic keratin, prominent keratohyalin granules, and intranuclear inclusion bodies. PCR identified EdPV1 in 6 of 9 samples and EdPV2 in the remaining 3 samples. NGS resulted in 100% genome coverage of EdPV1 and 76.20% genome coverage of EdPV2 compared with GenBank reference sequences, with 99.8% sequence identity to the complete EdPV2 L1 gene of a novel subtype recently identified in France. Hybridization patterns in 9 of the 10 (90.0%) porcupines were characterized by strong nuclear signals in the superficial epidermis, with strong nuclear and punctate cytoplasmic signals in the stratum spinosum and basale. In one animal, CISH suggested dual EdPV1 and EdPV2 infection.

Diagnosis and phylogenetic analysis of bovine papillomaviruses in cattle papillomatosis cases by different methods.

Papillomaviruses, known as epitheliotropic, cause proliferation in the skin, mucosa, and different visceral organs. In this study, it was aimed to diagnose bovine papillomavirus (BPV) by using different methods in the lesion taken from twenty cattle with papillomas in different areas of the body and to reveal its molecular characterization. In our study, molecular, immunohistochemistry, and transmission electron microscopy (TEM) methods were used for virus identification. Additionally, sequencing analysis was used to ascertain the phylogenetic relationship between the obtained field strains and other isolates submitted to GenBank. Histopathological analyses of the collected samples were done in addition to diagnostic procedures. Intranuclear virus particles were detected when the papillomas were investigated with TEM. In PCR analyses using degenerate and type-specific primer sets, the presence of BPV nucleic acid was determined in 70% (14/20) and 90% (18/20) of the samples, respectively. No virus could be detected in PCR applications using MY 09/11 degenerate primer sets. Twenty animals of different ages, races, and genders included in the study by random sampling method from different herds were divided into 4 groups according to the body regions where the lesions were located. Sequence analysis was performed on a sample from each group that showed strong positivity in the PCR technique using FAP 59/64 degenerate primer set and type-specific primer set. Sequence analyses were performed using FAP 59/64 degenerate primers of amplicons for phylogenetic research. In these analyses, three of the isolated strains were identified as BPV-1, which is in the Deltapapillomavirus 4 genus, and one as BPV-2. As a result of the study, it was concluded that molecular and phylogenetic studies using type-specific primers are more beneficial in order to fully reveal the etiology of papillomatosis in cattle and it would be correct to determine BPV types before prophylactic (vaccine, etc.) applications.

Genetic Characterization of a Novel Equus caballus Papillomavirus Isolated from a Thoroughbred Mare.

Papillomaviruses (PVs) are small, non-enveloped viruses, ubiquitous across the animal kingdom. PVs induce diverse forms of infection, such as cutaneous papillomas, genital papillomatosis, and carcinomas. During a survey on the fertility status of a mare, a novel Equus caballus PV (EcPV) has been identified using Next Generation Sequencing, and it was further confirmed with genome-walking PCR and Sanger sequencing. The complete circular genome 7607 bp long shares 67% average percentage of identity with EcPV9, EcPV2, EcPV1, and EcPV6, justifying a new classification as Equus caballus PV 10 (EcPV10). All EcPV genes are conserved in EcPV10, and phylogenetic analysis indicates that EcPV10 is closely related to EcPV9 and EcPV2, genus Dyoiota 1. A preliminary EcPV10 genoprevalence study, carried out on 216 horses using Real Time PCRs, suggested a low incidence of this isolate (3.7%) compared to EcPVs of the same genus such as EcPV2 and EcPV9 in the same horse population. We hypothesize a transmission mechanism different from the one observed in the closely related EcPV9 and EcPV2 that particularly infect Thoroughbreds. This horse breed is usually submitted to natural mating, thus indicating a possible sexual diffusion. No differences were detected for breeds in terms of susceptibility to EcPV10. Further studies are needed to investigate the molecular mechanisms behind the host and EcPV10 infection to explain the reduced viral spread.

Report of a self-resolving corneal viral papilloma in a dog.

A 10-month-old male castrated beagle dog, without prior history of ocular disease, was referred for a corneal mass of the right eye. A non-painful raised mass with frond-like projections originated from the dorsotemporal paraxial cornea of the right eye. In addition, a plaque-like conjunctival lesion and several raised, smooth masses of the eyelid were noted around the right eye. An incisional biopsy of the corneal mass and an excisional biopsy of the conjunctival mass were performed. Histopathology confirmed the clinical diagnosis of viral papilloma. Conservative management with monitoring was elected, and the lesion self-resolved 3 mo after initial appearance. Key clinical message: This case suggests that monitoring is appropriate for corneal lesions definitively diagnosed as viral papillomas, as they may be self-limiting.

Rapport d'un papillome viral cornéen auto-résolutif chez un chien. Un chien beagle mâle castré âgé de 10 mois, sans antécédent de maladie oculaire, a été envoyé pour consultation pour une masse cornéenne de l'oeil droit. Une masse surélevée non douloureuse avec des projections en forme de frondes provenait de la cornée paraxiale dorso-temporale de l'oeil droit. De plus, une lésion conjonctivale en forme de plaque et plusieurs masses surélevées et lisses de la paupière ont été notées autour de l'oeil droit. Une biopsie incisionnelle de la masse cornéenne et une biopsie excisionnelle de la masse conjonctivale ont été réalisées. L'histopathologie a confirmé le diagnostic clinique de papillome viral. Une prise en charge conservatrice avec surveillance a été choisie et la lésion s'est résolue d'elle-même 3 mois après l'apparition initiale.Message clinique clé :Ce cas suggère que la surveillance est appropriée pour les lésions cornéennes définitivement diagnostiquées comme des papillomes viraux, car elles peuvent être spontanément auto-limitantes.(Traduit par Dr Serge Messier).

Molecular genotyping, histopathological and immunohistochemical studies of bovine papillomatosis.

Background: Bovine papillomatosis (BP) is considered the most common health problem in large cattle farms. Aim: This study attempts to confirm clinically suspected BP in cattle by polymerase chain reaction (PCR) assay, histopathology, immunohistochemistry (IHC), and genotyping analysis of local isolates. Methods: According to morphological appearance and lesion features, a cross sectional study of 54 clinically diagnosed BP cattle was assigned to this current investigation from May to August (2021) in Al-Kut district (Wasit Province, Iraq) private veterinary clinics using purposive sampling technique based on set criteria. The cattle were diagnosed clinically, and the tissues were collected and some fixed in 10% neutral buffered formalin and other stored frozen and examined by histopathological technique, IHC, and PCR assays. Results: Using PCR assay, all cattle were positive for the BPV L1 gene. According to detect the L1 gene, analysis of the phylogenetic tree showed that local BPV cattle isolates were closely related to the NCBI-BLAST BPV type-1 and type-2 of the Polish equine isolate (KF284133.1) and BPV Brazilian Bostaurus isolate (MH187961.1), respectively. Histological detection showed there were acanthosis, hyperkeratosis, epidermal thickening, severe infiltration of mononuclear cells, massive hemorrhage, dermal fibroplasias, multifocal spongiosis, moderate neovascularization, moderate to severe elongation of the retention ridge towards the dermis, parakeratosis, rings of calcification, and necrosis with nuclear pyknosis of some spinosum cells. Immunohistochemical findings of tumor necrosis factor-alpha, epidermal growth factor receptor and Fascin showed a significant variation in values of immunoreaction in the dermis and epidermis. These results ranged from negative (0) to mild positive (+1) to moderate positive (+2) reactions. Conclusion: The study provided essential molecular and genotyping data to improve our knowledge by emphasizing the crucial of IHC as an elegant diagnostic method to detect cellular alterations.

The effect of multiple-dose ivermectin treatment on CD4+/CD8+ and the oxidative stress index in goats with udder viral papillomatosis.

This study aims to reveal the therapeutic effect of ivermectin against Capra hircus papillomavirus (ChPV-1) infection and on the CD4+/CD8+ (cluster of differentiation) and oxidative stress index (OSI). Twenty hair goats naturally infected with ChPV-1 were divided into two groups with equal numbers as the ivermectin group and the control groups. Ivermectin was administered subcutaneously at a dose of 0.2 mg/kg to the goats in the ivermectin group on days 0, 7, and 21. Blood samples were collected from the vena jugularis on days 0, 21, 45, and 90. The cluster of differentiation4+/CD8+ ratio was significantly higher in the ivermectin group than in the control group on the 90th day. Furthermore, the CD8+ concentration was significantly decreased in the ivermectin group on the 90th day compared with the control group. Both total oxidant status (TOS) and OSI were found to be significantly higher in the control group on the 21st and 45th days than in the ivermectin group. On the 90th day, it was determined that the lesions in the ivermectin group improved significantly compared to those in the control group. Additionally, only in the ivermectin group was there a significant difference between the 90th day and the other days in terms of healing. As a result, it can be suggested that ivermectin has positive effects on the immune response and that its oxidative actions are of therapeutic value and do not harm the systemic oxidative status, as in untreated goats.

Cyclosporine induced generalized hyperkeratosis in a dog.

INTRODUCTION: Cyclosporine is a potent immunosuppressive agent used in veterinary medicine to treat a variety of inflammatory or immune mediated conditions. Many adverse effects are associated with this medication, however most of them rarely occur. A 5-year-old, female intact French bulldog was presented with multiple, multifocally distributed, severe hyperkeratotic and papillomatous/verrucous plaques. The dog was on long-term immunosuppressive treatment with cyclosporine for meningoencephalitis of unknown origin (MUO). It had an history of atopic dermatitis and calcinosis cutis. A papillomavirus infection was excluded by polymerase chain reaction (PCR), and histopathologic analysis revealed a chronic lymphoplasmacytic non-specific dermatitis, perifolliculitis and periadnexitis and focal folliculitis with papillomatous epidermal hyperplasia and orthokeratotic hyperkeratosis. The diagnosis of "cyclosporine-induced epidermal hyperplasia with secondary pyoderma" was made. Cyclosporine was discontinued and as an alternative mycophenolate mofetil was started to control the MUO. An antimicrobial treatment was prescribed for three weeks. After four months, the skin lesions had healed completely. To date after 2 years, the dog is still in remission. The occurrence of hyperplastic lesions associated with cyclosporine therapy have already been described in previous reports. Most of them resemble those of psoriasiform lichenoid dermatitis, although papilloma virus may be detected in some instances. The dog of the present case showed some peculiarities in the histopathological findings, and a papillomavirus involvement was ruled out with PCR. Like observed in a previous report, there was no correlation between cyclosporine blood level and the severity of dermatological changes. A discontinuation of cyclosporine resulted in complete healing in 4 months. This case highlights the importance of regular monitoring and follow-ups in patients on immunosuppressive therapy. Even rare side effects should always be considered in these cases.

INTRODUCTION: La cyclosporine est un puissant agent immunosuppresseur utilisé en médecine vétérinaire pour traiter une variété de conditions inflammatoires ou à médiation immunitaire. De nombreux effets indésirables sont associés à ce médicament, mais la plupart d'entre eux se produisent rarement. Un bouledogue français intact, âgé de 5 ans, a été présenté avec de multiples plaques hyperkératosiques et papillomateuses/verruqueuses sévères, réparties de manière multifocale. Le chien suivait un traitement immunosuppresseur à long terme à base de cyclosporine pour une méningo-encéphalite d'origine inconnue (MUO). Il avait des antécédents de dermatite atopique et de calcinosis cutis. Une infection à papillomavirus a été exclue par réaction en chaîne par polymérase (PCR) et l'analyse histopathologique a révélé une dermatite chronique lymphoplasmocytaire non spécifique, une périfolliculite et une périannexite ainsi qu'une folliculite focale avec hyperplasie épidermique papillomateuse et hyperkératose orthokératosique. Le diagnostic d'¼hyperplasie épidermique induite par la cyclosporine avec pyodermie secondaire¼ a été posé. La cyclosporine a été stoppée et on a commencé à administrer du mycophénolate mofétil comme alternative pour contrôler l'OMU. Un traitement antimicrobien a été prescrit pendant trois semaines. Après quatre mois, les lésions cutanées étaient complètement guéries. À ce jour, après deux ans, le chien est toujours en rémission. L'apparition de lésions hyperplasiques associées au traitement par la cyclosporine a déjà été décrite dans des rapports précédents. La plupart d'entre elles ressemblent à celles de la dermatite lichénoïde psoriasiforme, bien que le virus du papillome puisse être détecté dans certains cas. Le chien du cas présent présentait quelques particularités dans les résultats histopathologiques et une implication du papillomavirus a été exclue par PCR. Comme observé dans un rapport précédent, il n'y avait pas de corrélation entre le taux sanguin de cyclosporine et la sévérité des altérations dermatologiques. L'arrêt de la cyclosporine a permis une guérison complète en 4 mois. Ce cas souligne l'importance d'une surveillance et d'un suivi réguliers des patients sous traitement immunosuppresseur. Les effets secondaires, même rares, doivent toujours être pris en compte dans ces cas.

Phylogenetic analysis and searching bovine papillomaviruses in teat papillomatosis cases in cattle by performing histopathology, immunohistochemistry, and transmission electron microscopy.

Papillomaviruses are epitheliotropic in nature and cause proliferation in the skin, mucosa, and various internal organs of various animal species. The lesions they cause, specifically in cattle teats, lead to significant economic losses in the milk industry. In this study, we identified the bovine papillomaviruses (BPVs) responsible for teat papillomas in cattle. The tissue damage caused by the virus was examined histopathologically using immunohistochemical, transmission electron microscopy (TEM), and molecular methods. Additionally, sequence analyses were performed on the isolated field strains to better understand their genetic and phylogenetic relationships with previously reported isolates. Teat papillomatosis was confirmed in the collected samples by histopathological and immunohistochemical methods, which were followed by other diagnostic methods. Intranuclear virus particles were found in the epithelial cells during a TEM examination of teat lesions. BPV was detected in seven samples by performing PCR using degenerate primers and specific primers. The positive samples were used for typing through sequence analysis/PCR with type-specific primers. Three isolates from teat tissues with BPV infection were identified as BPV-6, two as BPV-10, one as BPV-2, and one as BPV-8. The five isolates identified through sequence analysis of positive samples belonged to the Xipapillomavirus 1 genus (one), the Epsilonpapillomavirus 1 genus (one), and the Deltapapillomavirus genus (one) (three). Furthermore, type-specific primers were found to be useful for molecular diagnosis of BPV, which occurs in the etiology of teat papillomas, followed by genotyping and primer generation during characterization. The detection of BPV types and their prevalence, biosafety measures in animal breeding, and the importance of vaccine research are all important.

Treatment of Recurrent Multifocal Cutaneous Squamous Cell Carcinoma in an African Grey Parrot (Psittacus erithacus) with Intralesional Carboplatin in Poloxamer 407.

A 16-year-old male Congo African grey parrot (Psittacus erithacus) was presented with an ulcerated wing mass that was excised and diagnosed on histopathology as squamous cell carcinoma (SCC). A second surgery was performed to completely excise the tumor margins, resulting in over 5 years of remission for the neoplasm. However, over the next 6 years the patient developed SCC in 3 new locations on the body, as well as 2 squamous papillomas. The 2 papillomas were surgically excised and did not recur. Due to their size and location, none of the 3 new SCCs were amenable to complete excision. Instead, the 3 SCCs were managed with a series of treatments with intralesional carboplatin in poloxamer 407 and carbon dioxide surgical laser debridements. This treatment regimen has resulted in long-term (52 months, 30 months, and 17 months) resolution for all 3 of the SCCs. The overall survival time for the patient, from the initial diagnosis to the time of this report, is over 2900 days. While being treated for the 3 SCCs, the African grey parrot had no overt signs of complications or adverse side effects.

Sublingual papillomas of cheetahs in southern Africa.

Nine distinct papillomaviruses (Lambdapapillomavirus) have been described in domestic and nondomestic cats, but not in cheetahs. These viruses have been associated with cutaneous papillomas or plaques, bowenoid in situ carcinomas, feline cutaneous squamous cell carcinomas (SCC), feline sarcoids, and oral (often sublingual) papillomas. Fourteen cheetahs from the AfriCat foundation (Namibia) and one from the Ann van Dyk Cheetah center (South Africa) presented with sublingual lesions reminiscent of sublingual papillomas. Two animals were biopsied and the histopathology revealed benign proliferative epithelial lesions with prominent thickening of the overlying squamous epithelium. Throughout the squamous epithelial layers were cells with nuclear enlargement, irregularity of the nuclear membranes and cell contours, focal hyperchromasia of the nuclei, and perinuclear halos, reminiscent of a virus-associated process as seen in papillomavirus infections. Thirteen more cheetahs were sampled and the tissue snap frozen for molecular characterization. Amplification and sequencing of the papillomavirus L1, E6, E7, and E1 gene regions was achieved with modified primers. Maximum likelihood phylogenetic analyses revealed all 15 cheetah papilloma samples were 99.99% genetically similar and closely related to, but genetically distinct from any known felinepapillomaviruses. All cheetahs were FIV and FeLV negative. The results suggest the samples identified in this study can be considered a previously undescribed or novel feline papillomavirus and the authors propose "Acinonyx jubatus papillomavirus type 1" (AjPV-1), within the Lambdapapillomavirus 1 genus (Family: Papillomaviridae).

Fibropapillomatosis dynamics in green sea turtles Chelonia mydas over 15 years of monitoring in Akumal Bay, Quintana Roo, Mexico.

Fibropapillomatosis (FP) is a tumor disease that affects all sea turtle species but is mainly seen in green turtles Chelonia mydas. The pathology of FP has been described extensively, but its dynamics in populations over time have been less studied. We analyzed the dynamics of FP in a population of green turtles in Akumal Bay on the central coast of the Mexican Caribbean. A total of 475 green turtles were captured over 15 yr (2004-2018). The highest prevalence of FP was found in the largest turtles, and there was a positive relationship between FP prevalence and size of turtles. FP was first detected in 2008 at a prevalence of 1.6%, and annual prevalence increased markedly from 17.9% in 2015 to 54% by 2018. Likewise, severity of FP increased over time, with most turtles falling into moderately to severely diseased categories (tumor score 2). The average size of turtles with FP was significantly larger than the size of individuals without FP. Regression of tumors was seen in 21% of turtles, tumor score was higher in smaller individuals, and only tumor score 2 was present in the largest sea turtles. An increase in the prevalence and tumor score of FP coincided with the massive arrival of Sargassum in 2015, suggesting that altered environmental conditions may have played a role. The increased prevalence of FP in Akumal Bay prompts the need to explain what might be driving this phenomenon and how widespread it is in the Caribbean.

Cutaneous papilloma associated with a novel papillomavirus sequence in a cat.

A 5-mm diameter mass developed on the nasal planum of a 4.5-y-old castrated male domestic shorthaired cat; the mass was raised ~2 mm above the surrounding skin. Histology revealed focal thickening of the epidermis with marked orthokeratosis. Many of the epidermal cells within the mass had prominent papillomavirus-induced changes. A diagnosis of a viral papilloma was made, and a DNA sequence from a novel papillomavirus type was amplified from the lesion. Although the sequence was most similar to other feline papillomavirus types, the low level of similarity was suggestive of a novel papillomavirus genus. There has been no recurrence of the mass or development of additional lesions in the 6 mo since the mass was removed. This is the third cutaneous papilloma reported in a cat; a putative feline papillomavirus type has not been identified previously within these lesions, to our knowledge. Our findings expand the range of lesions associated with papillomaviruses in cats and increase the number of papillomavirus types that infect cats.

Characterization of novel papillomavirus from free-ranging Antillean manatee Trichechus manatus manatus with genital papillomatosis.

The Antillean manatee Trichechus manatus manatus is an Endangered species living along the Atlantic coasts of the Americas from Florida (USA), throughout the Caribbean, to Brazil. In July 2020, a manatee with multiple wounds due to boat-inflicted trauma was rescued from the coast east of Cayo Mata, Salinas, Puerto Rico. This manatee had neutropenia, leukopenia, and monocytosis associated with immunosuppression and nutritional deficiency anemia, as well as bacteria and fungi within the lesions. The manatee had genital lesions which included papules and linear plaques, microscopically characterized by mucosal hyperplasia with cytopathic changes typical of papillomavirus infection. Superficial epithelial cells had strong nuclear immunolabeling when examined using a monoclonal antibody specific to papillomavirus. The sequencing data of PCR products with papillomavirus-specific degenerative primers indicated that these lesions contained a novel manatee papillomavirus (Trichechus manatus papillomavirus, TmPV). The genomic DNA was amplified using a rolling circle amplification, and fully sequenced to be 7586 bp (GenBank accession no. OK073977). Other TmPVs were previously isolated from Florida manatees T. manatus latirostris. This novel virus was designated TmPV type 5 (TmPV5) based on its genomic characterization and sequence comparison. The TmPV5 genome shared 50.7, 48.9, 69.4, and 62.1% similarities with TmPV1, TmPV2, TmPV3, and TmPV4, respectively. TmPV5 is classified in the genus Rhopapillomavirus together with other manatee papillomaviruses. After 2.5 mo of veterinary treatment and rehabilitation, the manatee recovered and was released. This is the first report of papillomatosis in a free-ranging Antillean manatee.

Molecular detection of Papillomavirus and immunohistochemical investigation of p53 gene expressions in bovine papillomas and fibropapillomas.

Papilloma and fibropapilloma cases are quite common in cattle breeding, which cause economic losses due to decrease in the production of milk, meat, and also impair the quality of hide. In this study, we aimed to determine viral etiology and investigate p53 expression levels with immunohistochemical methods from a total of 30 cases. The study material was collected between 2013 and 2021 in Kars, Turkey. Paraffin embedded tissues were used for earlier cases in which the freshly specimens could not be provided. Cases were investigated for papillomavirus etiology with polymerase chain reaction (PCR) using FAP59/FAP64 and MY09/MY11 primer pairs. In 20 of the 30 cases papillomaviruses were identified, and 10 cases were identified as Bovine papillomavirus-1 (BPV-1), 1 case as BPV-2, 1 case as BPV-12, and 1 case as equus caballus papillomavirus 2 (EcPV-2) after sequence analysis. p53 immunostaining was also performed, and the cases were graded according to the positively stained cells. In conclusion BPV-12 was detected for the first time in our country, EcPV-2 was detected first time in cattle indicating cross species infection and p53 was staining most evident in BPV-1 and BPV-2 cases and BPV-12 and EcPV-2 was not stained.

Genome typing, histopathology, and evolution of BPV30, a novel Xipapillomavirus type isolated from Bovine papilloma in Costa Rica.

Xipapillomavirus includes a group of viruses almost exclusively reported in both beef cattle and dairy breeding, in which they induce papillomatosis and occasionally malignant tumors. Bovine papillomaviruses (BPVs) infection impacts greatly on animal productions, and this is amplified by their cosmopolitan distribution. Cutaneous proliferative lesions in bovines can relate to leather depreciation and impaired milk production by giving rise to obstruction of the teat and hygiene limitations, often leading to hemorrhagic mastitis. This study reports the identification of a novel Xipapillomavirus type associated with udder papilloma in a Jersey cow in Costa Rica. Viral genome was fully sequenced and molecularly characterized. Histopathology and viral phylogeny and evolution are also presented and discussed by comparison with already described BPVs. Based on results, a novel Xipapillomavirus type, namely BPV30, is proposed. BPV30 is a typical Xipapillomavirus 2 most similar to BPV12, from which it separated roughly 18 million years ago. The absence of E6 and the presence of E10 in BPV30 confirm an E6 loss occurring along the clade leading to BPV12. The identification of this novel BPV is fundamental to the development of specific prophylactic tools, which represent the most effective weapon to fight viral circulation, to prevent infections, and eventually controlling associated proliferative lesions.