Spontaneous Vitiligo in a Captive Rhesus Monkey (Macaca Mulatta).

Vitiligo affects a significant portion of human and animal populations. The disease causes irregular and multifocal progressive loss of fur, skin, and mucous membrane pigmentation due to the loss or absence of melanocytes. While etiopathogenesis is not completely understood, autoimmunity, environmental, and genetic factors are implicated We present a case report on a 16-y-old female rhesus macaque (Macaca mulatta ) with depigmented areas that are progressively increasing on the skin and coat and are distributed on the head and back. Histopathology revealed alterations compatible with vitiligo characterized by the absence of melanocytes in the epidermis and dermis. The clinical history and complementary exams support this diagnosis.

A shared agenda for gender and COVID-19 research: priorities based on broadening engagement in science.

While the acute and collective crisis from the pandemic is over, an estimated 2.5 million people died from COVID-19 in 2022, tens of millions suffer from long COVID and national economies still reel from multiple deprivations exacerbated by the pandemic. Sex and gender biases deeply mark these evolving experiences of COVID-19, impacting the quality of science and effectiveness of the responses deployed. To galvanise change by strengthening evidence-informed inclusion of sex and gender in COVID-19 practice, we led a virtual collaboration to articulate and prioritise gender and COVID-19 research needs. In addition to standard prioritisation surveys, feminist principles mindful of intersectional power dynamics underpinned how we reviewed research gaps, framed research questions and discussed emergent findings. The collaborative research agenda-setting exercise engaged over 900 participants primarily from low/middle-income countries in varied activities. The top 21 research questions included the importance of the needs of pregnant and lactating women and information systems that enable sex-disaggregated analysis. Gender and intersectional aspects to improving vaccine uptake, access to health services, measures against gender-based violence and integrating gender in health systems were also prioritised. These priorities are shaped by more inclusive ways of working, which are critical for global health as it faces further uncertainties in the aftermath of COVID-19. It remains imperative to address the basics in gender and health (sex-disaggregated data and sex-specific needs) and also advance transformational goals to advance gender justice across health and social policies, including those related to global research.

Pulmonary Granuloma Is Not Always the Tuberculosis Hallmark: Pathology of Tuberculosis Stages in New World and Old World Monkeys Naturally Infected with the Mycobacterium tuberculosis Complex.

We present the pathology of monkeys naturally infected with Mycobacterium tuberculosis complex from five different colonies in Rio de Janeiro, Brazil. On the basis of gross and histopathological findings, the lesions were classified into chronic-active, extrapulmonary, early-activation or latent-reactivation stages. Typical granulomatous pneumonia was seen in 46.6% of cases (six rhesus monkeys [Macaca mulatta] and one Uta Hick's bearded saki [Chiropotes utahickae]). The absence of pulmonary granulomas did not preclude a diagnosis of tuberculosis (TB): classical granulomatous pneumonia was observed in the chronic-active and latent-reactivation stages but not in the extrapulmonary and early-activation stages. The early-activation stage was characterized by interstitial pneumonia with a predominance of foamy macrophages and molecular and immunohistochemical evidence of M. tuberculosis complex infection. TB should be considered as a cause of interstitial pneumonia in New World Monkeys. We recommend the use of immunohistochemistry and molecular analysis for diagnosis of TB, even when typical macroscopic or histological changes are not observed.

Sofosbuvir shows a protective effect against vertical transmission of Zika virus and the associated congenital syndrome in rhesus monkeys.

The outbreaks of Zika virus (ZIKV) infection in Brazil, 2015-2016, were associated with severe congenital malformations. Our translational study aimed to test the efficacy of the antiviral agent sofosbuvir (SOF) against vertical transmission of ZIKV and the associated congenital syndrome (CZS), using a rhesus monkey model. Eight pregnant macaques were successfully infected during the organogenesis phase with a Brazilian ZIKV strain; five of them received SOF from two to fifteen days post-infection. Both groups of dams showed ZIKV-associated clinical signals, detectable ZIKV RNA in several specimens, specific anti-ZIKV IgM and IgG antibodies, and maternal neutralizing antibodies. However, malformations occurred only among non-treated dam offspring. Compared to non-treated animals, all SOF-treated dams had a shorter ZIKV viremia and four of five neonates had undetectable ZIKV RNA in blood and tissue samples. These results support further clinical evaluations aiming for the prevention of CZS.

Detection of mycobacterial infection in non-human primates using the Xpert MTB/RIF molecular assay.

Tuberculosis is a major public health concern, and diagnostic strategies applied to animal populations are scarce. As part of ongoing efforts to control tuberculosis dissemination at our animal facility, two non-human primates (NHP, Saimiri sciureus) presenting cutaneous lesions were examined for mycobacterial infection. Both animals tested positive for acid-fast bacilli and Mycobacterium tuberculosis using a molecular assay (IS6110 PCR). Animals were euthanized and several samples were tested for M. tuberculosis using the Xpert MTB/RIF assay. Many samples were positive for M. tuberculosis and rifampicin resistance, and some produced mycobacterial growth. Oral swabs from cage mates were then tested with Xpert MTB/RIF, and the majority tested positive for M. tuberculosis and rifampicin resistance, and produced growth in culture. To our knowledge, this is the first report of multidrug-resistant mycobacterial infection in NHP. Additionally, our data shows that the Xpert MTB/RIF assay can be useful as a screening tool for tuberculosis infection in NHP.

Variation in clitoral length in rhesus macaques (Macaca mulatta).

Clitoromegaly in the neonatal period is an important morphologic sign that can be useful for sexual determination in aberrant cases. In rhesus monkeys, differentiation of the external genitalia occurs early during gestation (at 55 to 60 d) and is complete by approximately 80 d. Most of the critical steps in genital differentiation in primates occur prenatally. We sought to determine clitoral size in normal rhesus monkeys (Macaca mulatta) and possible effects of age and inheritance. Clitoral length was highly variable and had no relationship to fertility. Statistical evaluation revealed no association in the distribution of daughters with and without clitoris between mothers with and without clitoris. However, even when mated with several female monkeys, some male macaques produced primarily daughters without clitoris.